Long time since I last requested for support here, so technically, I'm still a newbie.
Firstly, i've been using XNView Classic since it's ealiest versions and you have done a great job!
So thanks for that.

The issue started (I think) after the latest Windows Update last Sep. 9.
Did a restart after the Update.
Then, any file I open takes me to the usual Preview Mode, and then closes automatically.
I've tried uninstall / re-install, clean uninstall / reinstall, and still ended up with the same issue.
I'm currently using XNViewMP because this is the only one working.
But sadly, it feels slower (compared to the XNView Classic).
Even the Preview takes 4-5 secs to open.
Anyway, it would really be a great help if you can assist me with my XNView Classic, as I really want to switch back to using it.
Any help will be appreciated.
Thanks again and keep up the good work!
Cheers!