ArtRage Vitae - Save causes Error and crash - repeatable

[cloudmover]

Hello.
I am using a version purchased from the Mac app store.

ArtRage Vitae 7.1.4
Mac 12.4 Monterey

When saving any file AFTER the first initial version, I get this error message -
"Error. Bad parameter has been passed. ArtRage encountered an error trying to save the requested file. You may need to restart the application."

Example -
Create doc. Name it - Painting1.ptg
Change the doc. (apply brush stroke, change layer opacity, new layer, etc.)
Save changed doc. Painting1.ptg
Crash

Strangely, I can successfully save the file if I rename the file. This is unmanageable as I could potentially have a folder full of MANY, MANY iterative saves.

After many restarts, the error remains unresolved. I cannot save a file to itself.
Auto Save does not function.
I have deleted the app and downloaded it fresh from the Mac app store. No change.
I have also deleted the preferences in Library/Application Support

What can be done?

Below is an image of the error message.
The file was the default ArtRage doc saved once with one attempt to save three or four example brush strokes.