The Sozi version is 20.05.09-1589035558 -- very cool piece of software indeed, thank you :-)
And thanks for your kind response: A minor update to my initial entry: By re-starting the app I could actually make it work, yet:
I cannot reload artwork now.
(01) After quitting the software and start over again I loaded a svg-file with no problem.
(02) But trying to reload an image made the viewer disaapear (plaese see image) except for the menubar, which didn't appear to react when click/dragging
(03) The F12 appear unapt
(04) Only way to load a new image is to quit the progamme and start over once again.