XnView Software

Thanks for your help. Problem fixed. Admin rights...

Where are your setting saved in Tools > Settings > Integration tab ?

And are you accessing XnView MP from a user or an admin account?

I'm in Linux for multiple reasons, but wonder if there might be a file access rights issue in some configurations?

Edit: You are using the installed version, or ...

No, just one instance!

XnView: MP 1.52 64 bit
OS: Windows 10 64bit

Our program settings are being reset after every program start.
So, every setting has to be set again. Very annoying!