I am also having this problem when I load up a new project in DP7.2 (and all the previous version of DP) using the latest VE Pro. It only happens when I'm actually loading the DP project with VE Pro open. And if I have another K4.1 Player, only the first instance says it cannot load the plug-in. I'd be happy to send a console report. Please let me know if you want me to.
Interestingly, a way around this problem is to save the metaframe and open VE Pro and the saved metaframe AFTER the DP project is open. When I do that, the metaframe loads just fine. But it is a hassle.