Your serial does not match (AGAIN)

[chatrobot]

I am glad to see Hosters 3.12 finally become available. However, I am also pissed at the fact that once 3.12 becomes available, my Hosters 3.11 stop working and showing me the serial number not match with registration number. I followed the step to remove Hosters 3.11 and get 3.12 installed fine. Then, I found out my other MTU products, namely, MicroStudio, Keyrite, Vogone and KHpro all have the same problem with serial number not match with registration number while all these programs have no update whatsoever. Now I have to remove all these programs and reinstall. I don't understand why MTU wants to make their users suffers for no obvious reason. Am I the only one encoutering this problem?