In some cases Browser snapshot will suddenly display empty, or in the case of the preset Current Project and Plugin Database snapshots you may have all folders visible at once.
Empty Browser Snapshot
If a Browser snapshot is blank toggle the 'Browser menu > View > Show only opened folders' option.
Browser Snapshot Showing All Folders
If either the Current Project or Plugin Database Browser snapshots are showing all folders rather than their default snapshot view, make sure all folders are closed except for the Current Project or Plugin Database folders and toggle the 'Browser menu > View > Show only opened folders' option.
It's a bug and we haven't yet worked it out what causes it, when we do, we will fix it. Until then you know what to do ;)
Image-Line Support Team.