Apparently I was not (I was using the browser version). Works for me now :) Thank you very much!

P.S.: The crash bug is still active when trying to add a 6th copy of the card in the collection screen with the right click option "add to collection".

Great, thanks! One thing though: It is almost impossible to choose different languages and/or different gradings for each card if you have multiple copies of a card, because the list gets cut off at the bottom and you can't scroll down. Workaround (at least for a max. of ~20 cards) ist to reduce the zoom factor of the browser or to use tab to jump to the next drop-down. Is there a way to make scrolling possible? Great app otherwise! I noted some wrong pics for foreign old sets - should we report those, too?

That is great - thanks!