This posting is older than 6 months and can contain outdated information.
Thanks for asking - and sorry I only noticed your post now.
Remote Buddy saves the status of whether a specific license version was accepted or not in the preferences. If it asks the user over and over again, that can be for two main reasons:
1) it can't save a new set of preferences, f.ex. due to file system permissions prohibiting it from changing the respective plist file. You may want to check permissions of
~/Library/Preferences/com.iospirit.RemoteBuddy.plist
2) user-specific preferences are deleted by some other tool at each reboot/relogin. Again, the file you'd want to watch for there is usually
~/Library/Preferences/com.iospirit.RemoteBuddy.plist
Best regards,
Felix Schwarz