FH4 does not install properly

hi everyone!

I’m having issues with installing FH4 properly. I downloded the Ultimate Edition (for 2 days :frowning: ) and it installed immediately as you can see here (“Spielen” means “play it!”)

I have played this game for hours now, reaching level 152. Every plugin/dlc working good. Today I would have tried the route creator, but there is no button! Means no updates were installed (maybe). So I checked the MS Store app and in the overview it still says “install”:

When one clicks “install” there appears a “working” text ( = “In Arbeit”) with some running dots, where nothing happens (over 8 hours of sleep).

I’ve checked Google results for 3 hours, to no avail.

I’m completely new to Forza games, I don’t use the MS Store app (I’m a Steam guy). Here’s my rig: ASUS Z370G, i7 8700k, 32GB, GF GTX 1080 (GF Surround @ 5760x1080 + 1 extra mon @ 2560x1440), onboard sound, Win 10 64

Any ideas anyone?
TIA

Edit: The latest update of MS store app resolved this issue. Case closed.