Auto-close while saving extension-less files

[patbouvry]

Subject: 1.9.3 64b Auto-close while saving extension-less files
XnView: MP 1.9.3 64 bit
OS: Windows 11 Pro

After using SAVE AS or SAVE A COPY on a picture file WITH NO EXTENSION (opened with "open with" or by dragging), the software closes unexpectedly, even if multiple tabs (pictures) are opened.

Effect: Program unexpectedly closes

To reproduce:
1. Open one or multiple picture files with no extension
2. press SAVE AS or SAVE A COPY
3. press ok
Actual behaviour (bug): Program closes (crashes?) prematurely

Expected behaviour: Program should stay opened or at least give an option to be closed automatically (in settings).

[user0]

I cannot reproduce

share example file