It should be just mine, but there shouldn't be any from Cyan that mine don't over-write (except one that doesn't actually get used).
Maybe your DirectX is out of date?
http://www.microsoft.com/download/en/details.aspx?id=35 is where you can download an up-to-date version.
If that doesn't help:
Grab depends.exe from
http://www.dependencywalker.com/, point it to PlasmaMax.gup, and let me know which DLLs in the list have a yellow icon next to them. Some of those will be Max DLLs, and some will be from my bundle but I'll know which ones I'm expecting you to have pre-installed on your system, and I can tell you what to grab for it (or bundle it in the future).
EDIT: It's also possible your physx runtime is out-of-date, if the only PhysX-enabled program you use is Uru. There's an updated physx setup in my zip.