Hello Milos Kindl
We have checked and you have purchased extension on 17/02/2015 with standard subscription (12$) and now your subscription is expired and you need buy again
extension here:
joomcore.com/commercial-extensions/compo.../jo-vm-auto-facebook and install upgrade new version in your site
and can you send me joomla administrator via contact form? So we can help you
The extend will help me develop and update and fixed the bug when Facebook and virtuemart updated and support for you more than
Best regards
Bach Pham