That said, if you go to: Start->Settings (The one that is a Windows App)->System->Apps & Features. It will list all your programs, similar to the Programs and Features view, but will ALSO list Windows Store apps. Then, you should be able to select Forza and be presented with a "Move" Option:
Steam Save FAQ for Forza Horizon 4; Long initial load times and benchmark mode crash [Windows 10] Forza Horizon 4: PC Streaming/Broadcast Settings; Audio Troubleshooting; Performance Issues While Installing; Failure to Launch When Region and Language are Changed After Install; Engine Audio Does Not Change Gear in Replay Mode
Download xbox Insider hub, join windows gaming and then go to ms store, library, get updates. Wait for the xbox app and gaming services to update and it should work. If not wait for like 60 mins and verify files of fh5. 2. WC15lyD.