[quote="leo"]Try deleting the actual collection instead of just removing the contents of it.
The Scrap Collection toolbar has examples:
I don't think I tested that with sub-collections but I expect it'll work.[/quote]
Hmm, normally i´d like to keep the collections, but in the "delete scrap" button it´s clear, that the collections will immediately recreated, if specified. Then of course it should work. The subcollection also has to be recreated, but that´s no problem. Thanks!
A simple "flush all (or specified) collections" function wouldn´t be bad, though.