I gave ShareX a try via the PAP on a Win7 box, and it didn't work. Nothing happened upon launching the app.
I'm not sure if it's because the app isn't compatible with Win7 or there is an issue. If it's the former, probably a good idea to improve the UX; if it's the latter, well, then this is a bug report.
Please see the app notes: https://portableapps.com/apps/graphics_pictures/sharex-portable#app-notes
The platform automatically checks for this and alerts the user.
Sometimes, the impossible can become possible, if you're awesome!
Thanks, and sorry for the noise.
I must have been real tired when I tried it out. Because now that you mention it, I do recall getting an alert about that issue. I've been dealing with a lot, and I completely forgot about that alert when I went back to try the app again. Sorry for the noise.