According to TT's web site
8.080 is for these models:
This application version is the minimum requirement for the TomTom XL 330 Series (serial numbers starting with RM, RN, RO or RP) and TomTom ONE 130 Series (serial numbers starting with PN, PO, PP or PQ).
and 8.081 is for these models:
Version 8.081 (TomTom XL 330 Series with serial numbers starting with RM, RN, RO, RP, RV and ONE 130 Series with serial numbers starting with PN, PO, PP, PQ)
So, if indeed your application is 8.010, you may want to give support a call at 866-486-6866 to see what is going on.