I don't think your offered collateral is valid. Keys can be easily cracked.
I know keys where it will work for some time and eventually not work in the end.
Do you have any other collateral?
No i give you life time validity of keys. I promise it.
The thing you need to do is:
You have to be at only one program version.
You can update your database to current database.
Pros:
Your database keeps sample of latest virus , so your computer is aware of latest virus signatures.
cons:
Your program interface will be same for always.
I am ready for escrow or any demo. i need money by evening.