Phil, I`m myself behind VBOffice. If you only need to sync the master category list (mcl) once, you can use the mentioned addin, which is free for 30 days.
The described process of importing the *.reg file is limited to only 10 categories during the free trial period; a limitation that was added to the very first version about 10 years ago, which I never removed. However, you can use the sync feature of the Enterprise version to import all categories, this feature isn´t limited. For configuring the addin to sync the mcl between your two computers, see the documentation of the Addin starting at page 25.