I used organtec yesterday - i made absolutely no changes to my laptop - today i was off the network and i cannot start organtec because of badly implemented big-brother copyright protection. It is telling me that there were "some changes" made to my computer and that I need to reactivate online. There is no way to bypass this!! BE AWARE!! If you take your plugin to a location where there is no wifi - you would have no way to get out of this - making this a utter show-stopper. I also have pianotec pro - and that was not complaining. Punishing paying customers is totally not acceptable. I have stopped buying any new plugins cos I don't know what bullcrap copy-protection mechanics they might introduce.

Here's my observations on this. I have tested this on two workstations, which were both online, then taken offline, launched organteq without issues. these are both macs running MacOS Big Sir 11.3.1 and no issues.

Could I ask what OS and system you are on? the activation file is stored on your system so doesn't need an online check. maybe the file itself has been corrupted.

lew