After an update a trial version (not yet expired) started to refuse saving a file. Is it a new behaviour of the trial version?
No. This is is an unfortunate but. I will upload and update today.
I just downloaded the trial and then I read that there will be an new upload today. Should I wait? (I downloaded at 12.30 CET)
Try if you can save a file. If not, you should wait.
This issue still appears in 1.3.5
Just uploaded an update that should fix this issue.