Works as it should in pc and laptop for me, even on my samsung phone emulating a windows machine.
And i have directly downloaded the file from the morevna project website.
You could try to download again from the link I have provided, which is exactly the same as the link that was on the previous topic you posted.
And maybe then extract to a different location. And then open it through import option in file menu.
If nothing works, refer to this post, which contains the download link of the development project, it usually solves many of the bugs of the stable build:-
You can try to update windows (not re-install, but just update) if that can do something.
I don’t know if synfig provides a log file, but if it does, just upload it here to make it easier for us to understand.
And just try some more things you can think of, I am not a professional, but I believe trying these things could massively help.