A search on groups.google.com for "hotsync conduit order registry" yielded several hits, one of which said:
Open regedit, and navigate to HKCU\Software\U.S. Robotics\Pilot Desktop\
There's going to be a bunch of registry keys there named Application0,
Application1 etc. There's one for each conduit you have -- see the "Name"
key value for which is which.
The conduits are executed in alphabetical order (Application1 is executed
before Application 10, which is executed before Application2, and yes,
that's very lame).
You can remove the conduits you don't want here, and renumber them too.
That might be less trouble then completely uninstalling MaxLink, Palm Desktop, etc. and starting over.