This is the #1 fix for GUI-related crashes.
Ensure the drive containing your "Project Scratch" directory has at least 50–100GB of free space for large models. This is the #1 fix for GUI-related crashes
Also check AppData\Roaming\Ansys\vXXX (where XXX is your version) and consider renaming the version folder to vXXX_old to reset your user preferences. 2. Graphics Card Drivers and Hardware Acceleration This is the #1 fix for GUI-related crashes