Preview not working

[HenrikP]

Hello,

I´m having problem using the preview button when inserting loqic symbols.
Nothing happens when i press the preview button.

[russ]

Yes, this happens to me too on my Win10 computer.
I realized if you click Preview, then you use Alt+Tab and switch to another program, then Alt+Tab back again to Elwin the Preview windows pops up correctly.
Very annoying...