"sfFTPLib is not licensed" AGAIN and AGAIN !


Some of us receive this error message inside SmartFTP : sfFTPLib is not licensed. Reinstall the software to fix the problem.
This issue was solved in an another topic :
https://www.smartftp.com/forums/index.ph ... entry38781

But why this issue come and come again, and again ?

I know this issue reappear every 15 days
And each time, i'm affraid to lost all my FTP accounts, because i need to reinstall SmartFTP ....

How to fix that ? It's very irritating