Personally I'm not sure what the problem is, I'm not having any trouble importing pz3 files, textures import with them and while specularity, lights and various other settings need to be tweaked considerably it all appears to work. Having said that the previous build to the one released yesterday was a royal mess for me, almost nothing worked untill I deleted the previous install and tried fresh. The current release 0.8.22.6 I think it is, seems to work fine and auto deletes the previous install. Most of the problems I had with the release of last friday aren't in this build.