Hello Umberto,
thank you for the quick reply.
I got the error after reinstalling KORD a couple of days before, I haven't had any problems until then. After I figured out that the problem doesn't exist without the addon manager being installed, I concluded there must have been a change in the addon manager files because I never had the problem before, although I had FSDT products installed and registered. I also checked the digital signature of the bglman.dll, just to be sure, and as you said it says 2011.
There is no anti virus software or firewall active on my PC, so I am sure that there is no other software blocking the bglman.dll.