Last time you used ChimeraX it crashed.
Please describe steps that led to the crash here.
Windows fatal exception: access violation

Current thread 0x00005750 (most recent call first):
  File "C:\Program Files\ChimeraX 1.3.dev202109240602\bin\lib\site-packages\chimerax\ui\gui.py", line 359 in _cleanup
  File "C:\Program Files\ChimeraX 1.3.dev202109240602\bin\lib\site-packages\chimerax\ui\gui.py", line 396 in cb
  File "C:\Program Files\ChimeraX 1.3.dev202109240602\bin\lib\site-packages\chimerax\ui\gui.py", line 301 in event_loop
  File "C:\Program Files\ChimeraX 1.3.dev202109240602\bin\lib\site-packages\ChimeraX_main.py", line 880 in init
  File "C:\Program Files\ChimeraX 1.3.dev202109240602\bin\lib\site-packages\ChimeraX_main.py", line 1029 in 
  File "C:\Program Files\ChimeraX 1.3.dev202109240602\bin\lib\runpy.py", line 87 in _run_code
  File "C:\Program Files\ChimeraX 1.3.dev202109240602\bin\lib\runpy.py", line 197 in _run_module_as_main
===== Log before crash start =====
UCSF ChimeraX version: 1.3.dev202109240602 (2021-09-24)  
© 2016-2021 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open C:/Users/droug/Downloads/cryosparc_P52_J27_001_volume_map_sharp.mrc

Opened cryosparc_P52_J27_001_volume_map_sharp.mrc as #1, grid size
256,256,256, pixel 1.01, shown at level 0.193, step 1, values float32  

> open C:/Users/droug/Downloads/cryosparc_P52_J20_000_volume_map.mrc

Opened cryosparc_P52_J20_000_volume_map.mrc as #2, grid size 256,256,256,
pixel 1.01, shown at level 0.25, step 1, values float32  

> close session

> open C:/Users/droug/Downloads/cryosparc_P52_J29_019_volume_map.mrc

Opened cryosparc_P52_J29_019_volume_map.mrc as #1, grid size 256,256,256,
pixel 1.01, shown at level 0.144, step 1, values float32  

> open 7ahc

7ahc title:  
OpuA apo inward-facing [more info...]  
  
Chain information for 7ahc #2  
---  
Chain | Description | UniProt  
A B | ABC transporter permease subunit | A0A0V8ETW8_LACLL  
C D | ABC-type proline/glycine betaine transport system ATPase component |
A0A0R2NIU5_LACLL  
  

> close session


===== Log before crash end =====