Wrong thumbnail-image of stored pictures

[vipfug]

Hello,
I am new with XnviewMP 1-10-3. With Windows 11 the program should show the thumbnails of the stored pictures. Some correct, but most with a wrong image. The filename below each picture is correct.
What’s wrong? Can anyone help? Sorry for my bad English.
-vipfug-

[jkm]

Welcome to the forums...

To update thumbnails, use either:

1. On menu, View->Rebuild Thumbnails

OR

2. Tools->Settings:Catalog; select directories; click Rebuild Thumbnails