A FLIR representative told you THAT... Really ? It would appear that the person you spoke to was not familiar with the whole upgrade process.
For information if it was so simple as just loading a generic file, FLIR would effectively be allowing free upgrades to many units, which is not in their nature. As an example.... If a company used 20 of these scopes, they had to pay for 20 upgrades, not just 1 that could be shared with all 20 scopes. FLIR are in the business of making money and the upgrade was chargeable.
From memory, the upgrade is locked to the specific camera for which it was purchased. It may be possible to decompile the upgrade to hack it but I cannot provide any information on that. Changing the serial number of the scope to that of the one for which the upgrade was purchased might also work.
Fraser