(edit for searchable subject line - Jim)
Best answer by Kit
I was previously inquiring whether you asked us for support with your original problem prior to cancelling the renewal, and it sounds like you didn't. Please do always be encouraged to get help from us with any problems before cancelling service, since the cancellation of an active account can remove some data that can otherwise be used to assist you. Though of course if the account is still active and just the renewal is cancelled, that's a non-issue.
If wrsa.exe is prompting for UAC permissions when you start the computer, it's potentially set to run as administrator (a setting on the file itself for Compatibility Mode, but this should not be set), however it still sounds like the installation was damaged. For example, if the service was disabled or deleted by something, but the Run key is left behind and the settings data is damaged or corrupted, you will experience the symptoms you've described.
Your best bet in that case is to restart the computer into Safe Mode (Not "with networking", just regular Safe Mode). It should NOT prompt you or trry to run int hat case. Then remove:
The entire C:ProgramDataWRData folder
The entire C:Program FilesWebroot folder
The C:Program Files (x86)Webroot folder if it exists
This will remove all the code, but not the registry entries. You have the option to remove registry entries by hand, or to use a valid keycode (even a trial) to reinstall WRSA temporarily (takes a few seconds) and then uninstall it via normal methods thereafter, at which point it will clean up its stuff.
These are GENERIC directions, while the support contact opens a custom ticket for you and allows the collection of system-specific data via wsalogs.exe which allows for a tailored solution for your specific situation.