I've used Paint.net for many, many years. I've always downloaded the .exe file and run that to install. I've never had a problem working with the program, including adding a huge number of effects to the software.
Recently I had to "Reset" my computer, and lost everything that was not part of Windows 10. But, since I save 100% of my work on another drive (not C:\), that keeps me from having to shoot myself after I reset.
So I decided for the fresh install to download and install from Windows Store. BAD idea!!! I thought it was nice to throw a little money at the developers. But...Windows installs the software under - C:\User\{name}\Documents\paint.net User Files - for the main folder. I spent an inordinate amount of time finding that information.
I then followed the instructions to create the Effects, FileTypes and Shapes folders which are "outside" of the main PDN folder. Ok...so I've done that, added a couple of my effects to the proper folders and...that didn't work.
Specifically I'm trying to create a simple favicon. The single IcoCur.dll is placed in the \paint.net App Files\FileTypes with PDN closed. I opened PDN, opened the file I want to use to create the .ico favicon, then attempted to Save As then selected .ico
I remember that I had a little difficulty making the correct selections in order to create favicons in the past. But I'm getting nowhere today.
By default, there are (I believe) 8 (4 sets) of sizes selected. I left that alone and tried to save. Didn't work. I tried again to save but deselected all but 32x32 32bit, 32x32 8bit, 16x16 32bit, and 16x16 8bit - didn't work. Then I deselected all but 16x16 32bit and 16x16 8 bit...didn't work. I even went down to just 1 selection - 16x16 8bit...no dice.
I found and ran the troubleshooter, posted the code and it found nothing was wrong.
I'm going to reboot now, but since that's never been an issue previously I haven't yet. But if it's this big a pain to install add-ons for PDN, why in the world would I install from Windows Store?! If a reboot doesn't work, I'm going to uninstall and then reinstall using the downloaded method.
I'm happy to throw some money at the developers. But I know now, do NOT install from Windows Store! What a nightmare. It also seems to run slower than if I install from the download.