Prusa Slicer not working?  

Prusa Slicer not working?

Was having problems with my system clock running behind. After re-initializing windows time, slicer no longer works. Two symptoms. If I try to slice a 100mm tall temp tower, the program crashes. If I slice the extrusion calibration square (5mm high) the slicing is incorrect. Note the slider bar to move through the layers is also not present. I have un/reinstalled all prusa sw, rebooted several times....any ideas?

Temp Tower Crash

Config export text is as follows, not far from default:

# generated by PrusaSlicer 2.0.0+win64 on 2019-07-10 at 16:00:17
avoid_crossing_perimeters = 0
bed_shape = 0x0,250x0,250x210,0x210
bed_temperature = 66
before_layer_gcode = ;BEFORE_LAYER_CHANGE\nG92 E0.0\n;[layer_z]\n\n
between_objects_gcode =
bottom_fill_pattern = rectilinear
bottom_solid_layers = 5
bridge_acceleration = 1000
bridge_angle = 0
bridge_fan_speed = 100
bridge_flow_ratio = 0.8
bridge_speed = 30
brim_width = 0
clip_multipart_objects = 1
colorprint_heights =
compatible_printers_condition_cummulative = "printer_notes=~/.*PRINTER_VENDOR_PRUSA3D.*/ and printer_notes=~/.*PRINTER_MODEL_MK3.*/ and nozzle_diameter[0]==0.4";"! (printer_notes=~/.*PRINTER_VENDOR_PRUSA3D.*/ and printer_notes=~/.*PRINTER_MODEL_MK(2.5|3).*/ and single_extruder_multi_material)"
complete_objects = 0
cooling = 1
cooling_tube_length = 5
cooling_tube_retraction = 91.5
default_acceleration = 1000
default_filament_profile = "Prusament PLA"
default_print_profile = 0.15mm QUALITY MK3
deretract_speed = 0
disable_fan_first_layers = 1
dont_support_bridges = 1
duplicate_distance = 6
elefant_foot_compensation = 0
end_filament_gcode = "; Filament-specific end gcode"
end_gcode = G4 ; wait\nM221 S100\nM104 S0 ; turn off temperature\nM140 S0 ; turn off heatbed\nM107 ; turn off fan\n{if layer_z < max_print_height}G1 Z{z_offset+min(layer_z+30, max_print_height)}{endif} ; Move print head up\nG1 X0 Y200 F3000 ; home X axis\nM84 ; disable motors
ensure_vertical_shell_thickness = 1
external_perimeter_extrusion_width = 0.45
external_perimeter_speed = 25
external_perimeters_first = 0
extra_loading_move = -2
extra_perimeters = 0
extruder_clearance_height = 25
extruder_clearance_radius = 45
extruder_colour = #FFFF00
extruder_offset = 0x0
extrusion_axis = E
extrusion_multiplier = 1
extrusion_width = 0.45
fan_always_on = 1
fan_below_layer_time = 100
filament_colour = #FF3232
filament_cooling_final_speed = 3.4
filament_cooling_initial_speed = 2.2
filament_cooling_moves = 4
filament_cost = 24.99
filament_density = 1.24
filament_diameter = 1.75
filament_load_time = 0
filament_loading_speed = 28
filament_loading_speed_start = 3
filament_max_volumetric_speed = 15
filament_minimal_purge_on_wipe_tower = 15
filament_notes = "Affordable filament for everyday printing in premium quality manufactured in-house by Josef Prusa"
filament_ramming_parameters = "120 100 6.6 6.8 7.2 7.6 7.9 8.2 8.7 9.4 9.9 10.0| 0.05 6.6 0.45 6.8 0.95 7.8 1.45 8.3 1.95 9.7 2.45 10 2.95 7.6 3.45 7.6 3.95 7.6 4.45 7.6 4.95 7.6"
filament_settings_id = "Hatchbox PLA - Copy"
filament_soluble = 0
filament_toolchange_delay = 0
filament_type = PLA
filament_unload_time = 0
filament_unloading_speed = 90
filament_unloading_speed_start = 100
fill_angle = 45
fill_density = 15%
fill_pattern = honeycomb
first_layer_acceleration = 1000
first_layer_bed_temperature = 66
first_layer_extrusion_width = 0.42
first_layer_height = 0.2
first_layer_speed = 20
first_layer_temperature = 212
gap_fill_speed = 40
gcode_comments = 0
gcode_flavor = marlin
gcode_label_objects = 0
high_current_on_filament_swap = 0
host_type = octoprint
infill_acceleration = 1250
infill_every_layers = 1
infill_extruder = 1
infill_extrusion_width = 0.45
infill_first = 0
infill_only_where_needed = 0
infill_overlap = 25%
infill_speed = 80
inherits_cummulative = "0.15mm QUALITY MK3";"Prusament PLA";"Original Prusa i3 MK3S"
interface_shells = 0
layer_gcode = ;AFTER_LAYER_CHANGE\n;[layer_z]
layer_height = 0.15
machine_max_acceleration_e = 5000,5000
machine_max_acceleration_extruding = 1250,1250
machine_max_acceleration_retracting = 1250,1250
machine_max_acceleration_x = 1000,960
machine_max_acceleration_y = 1000,960
machine_max_acceleration_z = 1000,1000
machine_max_feedrate_e = 120,120
machine_max_feedrate_x = 200,100
machine_max_feedrate_y = 200,100
machine_max_feedrate_z = 12,12
machine_max_jerk_e = 1.5,1.5
machine_max_jerk_x = 8,8
machine_max_jerk_y = 8,8
machine_max_jerk_z = 0.4,0.4
machine_min_extruding_rate = 0,0
machine_min_travel_rate = 0,0
max_fan_speed = 100
max_layer_height = 0.25
max_print_height = 210
max_print_speed = 200
max_volumetric_speed = 0
min_fan_speed = 100
min_layer_height = 0.07
min_print_speed = 15
min_skirt_length = 4
notes =
nozzle_diameter = 0.4
only_retract_when_crossing_perimeters = 0
ooze_prevention = 0
output_filename_format = {input_filename_base}_{layer_height}mm_{filament_type[0]}_{printer_model}_{print_time}.gcode
overhangs = 0
parking_pos_retraction = 92
perimeter_acceleration = 800
perimeter_extruder = 1
perimeter_extrusion_width = 0.45
perimeter_speed = 45
perimeters = 3
post_process =
print_host =
print_settings_id = 0.15mm QUALITY MK3 - Copy
printer_model = MK3S
printer_notes = Don't remove the following keywords! These keywords are used in the "compatible printer" condition of the print and filament profiles to link the particular print and filament profiles to this printer profile.\nPRINTER_VENDOR_PRUSA3D\nPRINTER_MODEL_MK3\n
printer_settings_id = Original Prusa i3 MK3S - Copy
printer_technology = FFF
printer_variant = 0.4
printer_vendor =
printhost_apikey =
printhost_cafile =
raft_layers = 0
remaining_times = 1
resolution = 0
retract_before_travel = 1
retract_before_wipe = 0%
retract_layer_change = 1
retract_length = 1
retract_length_toolchange = 4
retract_lift = 0.6
retract_lift_above = 0
retract_lift_below = 209
retract_restart_extra = 0
retract_restart_extra_toolchange = 0
retract_speed = 50
seam_position = nearest
serial_port =
serial_speed = 250000
silent_mode = 1
single_extruder_multi_material = 0
single_extruder_multi_material_priming = 0
skirt_distance = 2
skirt_height = 3
skirts = 1
slice_closing_radius = 0.049
slowdown_below_layer_time = 20
small_perimeter_speed = 25
solid_infill_below_area = 0
solid_infill_every_layers = 0
solid_infill_extruder = 1
solid_infill_extrusion_width = 0.45
solid_infill_speed = 80
spiral_vase = 0
standby_temperature_delta = -5
start_filament_gcode = "M900 K{if printer_notes=~/.*PRINTER_HAS_BOWDEN.*/}200{elsif nozzle_diameter[0]==0.6}18{else}30{endif} ; Filament gcode"
start_gcode = M115 U3.7.2 ; tell printer latest fw version\nG90 ; use absolute coordinates\nM83 ; extruder relative mode\nM104 S[first_layer_temperature] ; set extruder temp\nM140 S[first_layer_bed_temperature] ; set bed temp\nM190 S[first_layer_bed_temperature] ; wait for bed temp\nM109 S[first_layer_temperature] ; wait for extruder temp\nG28 W ; home all without mesh bed level\nG80 ; mesh bed leveling\nG1 Y-3.0 F1000.0 ; go outside print area\nG92 E0.0\nG1 X60.0 E9.0 F1000.0 ; intro line\nG1 X100.0 E12.5 F1000.0 ; intro line\nG92 E0.0\nM221 S{if layer_height<0.075}100{else}95{endif}
support_material = 0
support_material_angle = 0
support_material_auto = 1
support_material_buildplate_only = 0
support_material_contact_distance = 0.1
support_material_enforce_layers = 0
support_material_extruder = 0
support_material_extrusion_width = 0.35
support_material_interface_contact_loops = 0
support_material_interface_extruder = 0
support_material_interface_layers = 2
support_material_interface_spacing = 0.2
support_material_interface_speed = 100%
support_material_pattern = rectilinear
support_material_spacing = 2
support_material_speed = 50
support_material_synchronize_layers = 0
support_material_threshold = 55
support_material_with_sheath = 0
support_material_xy_spacing = 50%
temperature = 205
thin_walls = 0
threads = 8
toolchange_gcode =
top_fill_pattern = rectilinear
top_infill_extrusion_width = 0.4
top_solid_infill_speed = 40
top_solid_layers = 7
travel_speed = 180
use_firmware_retraction = 0
use_relative_e_distances = 1
use_volumetric_e = 0
variable_layer_height = 1
wipe = 1
wipe_into_infill = 0
wipe_into_objects = 0
wipe_tower = 1
wipe_tower_bridging = 10
wipe_tower_rotation_angle = 0
wipe_tower_width = 60
wipe_tower_x = 170
wipe_tower_y = 125
wiping_volumes_extruders = 70,70
wiping_volumes_matrix = 0
xy_size_compensation = 0
z_offset = 0