[teeedubb]

Seems to consistently minimize itself using beta, normal, and different desktops in Ubuntu

Check the steam console output for some possible clues. Also you could post a issue on the steam for linux github tracker.

A few months ago someone asked how to launch the W10 Store version of Kodi from command line.

Just do a batch file that contains:

explorer kodi:

and it will launch. That being said I haven't been able to get any of my Kodi addons that require launching external apps to work in the Store version. I'm not sure if that's because apps get confused by the home folder redirect, or if there's something else going on. (To Kodi itself, it thinks it's operating in C:\users\name\AppData\Roaming\Kodi\ ... and to any process outside of Kodi, it's shown in its real location at C:\users\name\AppData\Local\Packages\XBMCFoundation.Kodi...\LocalCache\Roaming\Kodi\ )

Unfortunately this means that most of my frequently used addons (Steam, Hyper Launcher, Advanced Launcher which I use to launch UWP Netflix and UWP Xbox app) simply don't work in the UWP version. A tiny bit frustrating because I would otherwise love auto-update across all 3 of my Kodi devices, which the store would provide.

That sounds like a bug in kodi uwp - steam launcher will work if kodi is used in portable mode (ie user data is stored in a non default directory) because it uses the paths that kodi translates for python addons, not hardcoded paths (as does HL and AL). You could also try a junction link from the uwp userdata path to the non store userdata path