Perhaps it's not a matter of the ProgDVB release version, but related to 64bit.
Most plugins are not available in 64bit, so to use those in ProgDVB, you should chose the 32bit version of ProgDVB for them.
32bit ProgDVB versions are told to be working fine on a 64bit machine. At least they do over here.
I've got a test computer, work in progress for now, that holds a multi boot system with both XP SP3 32bit and Seven Pro 64 bit, and I've been playing around with one set of old and new versions of ProgDVB 32 bit on both Windows versions recently, that are located on an extra data partition.
Well, I did not yet really try to find limitations, but of course there may be some, like perhaps a limit for time shift in RAM, if more than 4GB available.
In case, feel free to find out more and report
