Hi:
I have a similar problen. My Tobii 4c will track in one version of DCS. My DCS (stable version)is installed on my E: drive. That works well.
However, I recently installed the beta version of DCS on my C: drive. I was able to switch the path to the program installed on my C: drive using Tobii game hub in the past and it would work in the beta version as well. However, now it only works on the stable version on my E: drive.