I've got a number of previously opened files in my Windows 10 timeline that are greyed out and can't be removed. Also, no new activity is shown. Clearing history/activity and enabling/disabling the feature does not resolve the problem.
Is there a way to reset the timeline or activity history, other than through the settings? Where is the cache stored?
HW: Surface Pro 4 (i5/8GB/250GB)
OS: Windows 10 (Version 1803 / Build 17134.1)