When I try to open a non existing file from menu "File" - recently used files list it disappears after an appropriate error message - that's correct.
But when I do the same from the "Options" page "recently opened files" list the invalid files persist. But I think they should disappear then here as well.
There seems to be also no x-sync, means if there is an invalid file detected in any of these choices it should be removed in both lists...
It's not a big deal, just not quite ok...