Serum Demo crashes reproducably

Hi,
I'm a big fan of serum and seriously considering to buy it, however the preset-manager always crashes on me (in ableton and FL Studio).
I can open the preset browser, choose a preset, and it plays fine, but I cannot close the preset manager any more - when I press the X serum crashes.
I'm using Version 1.245, unfortunately I can't find the info what the most recent version is…

Oh, and I forgot to mention: I'm using windows 10, 64 bit, and I already tried to delete the %AppData% - Serum folder, which didn't help.

The demo will be updated at some point, I'm sure that would be a non-issue or resolvable should you choose to purchase.