since somehow the edit button disappeared…
EDIT 2: looks like this error doesnt occur when i unmount the iso by right clicking the iso itself and select “mount”. then it successfully unmounts and i can successfully mount something else.
but going to “my computer” and “ejecting” the iso from there with right click results in new iso mount with wincdemu wont be assigned to a drive letter, although they are listed as mounted (according to the list in wincdemu portable)