XYplorer Beta Club

Any idea why this is happening?

Nope no idea, it all works ok for me, strange, does that box definitely have focus? because they will grey out if it loses focus.
Anyway if you want to reset it back to none you can tweak your ini file to this value to get back to default:

UserDefinedPreviewHandlers=.

But just unchecking them will be sufficient anyway.

for instructions on how to tweak:
https://www.xyplorer.com/faq-topic.php?id=tweak

Also try unchecking the complete UDP category, closing config then reopening config and seeing if it resolves itself, because in the top section it shouldn't have pdf,pdf displayed with only 1 item checked in the bottom section, so that is strange too.

Looks like a bug. I see the same behavior on my fully configured (portable) "installation" while it works fine
when tried with a fresh one. Either a setting or tweak I guess. No time to find the cause for this atm...

Thanks highend. Anyway, managed to delete from .ini file.

After creating a UDPH it can't be edited. Anyone else have this issue? How can I edit/remove the UDPH?

Thanks

Yep, that is a bug. I'm hunting it now...

UPDATE: It's a side effect of the Ext column now showing the CASE of extensions. That was a can of worms...