It sounds like the Activation didn't work. To reactivate it, you need to go to the registry and remove the C130 entry.

Start > Run > regedit > then navigate to HKEY_LOCAL_MACHINE\SOFTWARE\CaptainSim, or HKEY_LOCAL_MACHINE\SOFTWARE\SysWOW6432Node\CaptainSim for 64bit systems > delete the C130XPRO folder.

I recommend that when you run the installer to reinstall it, you right click on it, and select "Run as administrator" from the list, even if you are using Win8/8.1/10, where it appears to run it as an administrator by left clicking on it! Also, do a Manual Offline Activation.