Removal of custom default app

I tried as well and was able to set Irfanview as default the Open With-Choose Another App-Always Use this App route.

And I also use Winaero Tweaker and have never had a problem with it so I don't think it's the culprit.

Callender said:

It's weird how there's no option to choose another app by browsing to it.

I think the OP's got deeper seated problems.

Callender said:

I've used ImageGlass berfore - it's not too bad.

It's a nice lite app but, I still prefer Picasa!

BTW:
How do you pronounce IrfanView?
I've come across "er-fon-view" or "ear-fan-view"; I think the later is proper.

Callender said:

It's weird how there's no option to choose another app by browsing to it....

The option to browse for another app should be available through the 'Open with' dialog as per my screenshots in post #19. It may be relevant that the machine I used for that example has never used WinAero (or any other) tweaker.

Edwin said:

BTW:
How do you pronounce IrfanView?
I've come across "er-fon-view" or "ear-fan-view"; I think the later is proper.

From Wikipedia:
IrfanView (/ˈɪərfænvjuː/)

Don't know about you but that doesn't help me much.

Being old and knowing how American dictionaries used to handle pronunciation help, I've disliked the "new" IPA since I first saw it. I think you can take into account that the original author is not a native English speaker, and it is likely that the police will not visit you no matter how you pronounce it. I've always thought of the first two syllables as ur-fan.