Computer software reverse engineer

Hello, I have an exe setup program that needs licensing reverse Engineer or patch the license file requirement.

I have the setup file.
I have the license files (import and export)
I have access to the installed software at the site(for testing purposes)

This program is used to manage thin Client RDP devices. The problem is that without connecting it to the online server it will disconnect every 15-20 minutes but the client is local not the online server.
This software uses a timeout function to disconnect all the sessions that are trying to connect to it. We bought their hardware legally but they block us with reason we use it in different country which they didn't mention to my supplier.
If you need more info please let me know. We have 300-500 budget for this patch.
Software link will provide if you interested.