My Registration Key is not working

Q: I have purchased Folder Marker. Now I'm trying to enter my Registration Key in the program and everytime I restart it, the message is shown indicating that Folder Marker is not registered! What should I do?

A: Please, make sure you have downloaded and installed the appropriate edition of Folder Marker. A license key for Pro edition will not work with Home edition of Folder Marker and vice versa.

Also make sure you are using the right version of the program. A key for old version of Marker (2.x or 3.x) will not work with the 4.x versions. Please update or use the old version (can be downloaded form