my materialbrowser shows me one material, that did not exist in the materialfolder on the disk. (There is no such uasset-File) - So, everytime, I click at this material (in order to delete it from the materialbrowser), the Editor crashs. Sure, i can learn to ignore this materialname in the browser, but is there a way, to clean up the browser?
Could it be that this material only exists as a Redirector? In your Content Browser, choose Filters > Miscellaneous > Redirector. On any Redirector do a right-click and choose Fix Up