Sometimes you may be forced to zap your standalone licenses so you can start over with a clean slate. For example, you might not be able to activate your new license because somehow the licenses were corrupted. Or maybe you had a blue-screen crash during installation and then you used a reg cleaner to further muddy the waters. Or maybe the software asks you for activation every time you start the product.

In those types of scenarios, as a last resort, you can reset your standalone licenses by zapping the adskflex_00691b00_tsf.data and adskflex_00691b00_tsf.data.backup files.

I suggest you rename the file or move it, rather than simply deleting it.
However, you will have to re-activate all standalone Autodesk products installed on the computer.

On Vista or Windows 7:

C:\ProgramData\FLEXnet\adskflex_00691b00_tsf.data
C:\ProgramData\FLEXnet\adskflex_00691b00_tsf.data.backup

On Windows XP:

C:\Documents and Settings\All Users\Application Data\FLEXnet\adskflex_00691b00_tsf.data
C:\Documents and Settings\All Users\Application Data\FLEXnet\adskflex_00691b00_tsf.data.backup

I include the _tsf.data.backup file because your Autodesk software will reuse that file if it cannot find the _tsf.data file. And if that backup file is corrupted too, well then…