The license for the initial purchase of VideoMakerFX lets users install the program on 2 computers.
If the software was installed for the third time and accessed using the same credentials as the other 2, you will get the "Machine Limit Error" message.
Please uninstall the software on the extra machine and open a Support Ticket (or email support@videomakerfx.com) so we can further assist you.
If you want to install it on more than 2 computers, you're going to need to purchase Extended License Pack which provides 5 more licenses.