Access Database Program

[Mkz]

From the installation file you shared, here are some conclusions.

The binary is an MDE file, which is a compiled version of an Access database (MDB).
AFAIK there is no way to go back from the MDE to the original code. Unlike VBA macros for Excel, for instance, which can be extracted with some tools, I don't know any for Access code to be extracted from the MDE.
You can search the web for this, you'll likely find some paid services for this reversing but no free ones.

Anyway, in addition to the MDE "binary" there are also 2 regular MDB files containing tables and records.
The password to open these is "TerminalVelocity428". You can then browse the data and the tables and try to check where the expiry might be validated against.

Tables genPreference* and genProgramRegistry look like interesting ones.
Good luck!