DMullert wrote on May 26^th, 2021 at 12:15pm:

Yes, ACE keeps crashing with an error every time I launch it.  It started yesterday.  It no longer recognizes my installed 777.

If you have AV on (even after install), some AVs monitor .EXE activity pretty aggressively and if it sees an EXE it thinks is suspicious trying to start over and over...it auto-quarantines it or parts of its core to prevent it from harming your PC as it thinks its a malicious virus.

I'd check to see if it has done that.
you may also have to put all the CS folders and files in your AV exclusion list if it already associated those files/folders with this EXE file.