I don't think that's to do with ESF 1.3 Open Beta Final, really. It looks like it's a problem with recording software? ESF doesn't touch C:\Program Files\EuroPlus+ LiU\ at all. Also, the thing called 'Flashrec.exe' gives me an idea that it's recording software.
Basically, make sure that Flashrec.exe isn't running in the background, go to Task Manager, end proccess if you need to, delete it if you need to, and use Hypercam 2 or something.