Are you using an (older) or .accdb (newer) file format? Share public link
To help tailor further assistance, could you share you are seeing during activation, or what version of AccessFix you are currently running? Share public link
To safely activate the software and recover your database, follow the official registration process:
What or behavior are you seeing when opening the file? What is the file extension ( .mdb or .accdb )? Roughly how large is the database file?