Hi Endre,
Thanks for the feedback.
I’ve just re-checked on my test server and it seems to be working fine here. Could you please make sure that latest plugin version is installed on both your sites. Also please make sure that you click “Save changes” after you change “Variable products” option’s value (i.e. before clicking “Create now” button).
P.S. We’ve just released new plugin version 1.4.2. Not sure if this will make any difference, but there I’ve re-wrote some parts of the code related to “Variable products” option, so I would suggest trying with this new version.