CF Builder and Plastic SCM

If you're asking whether it's specifically supported, no. But as you may know, CFB is built atop Eclipse, and there is indeed an Eclipse plugin for Plastic, which should work with CFB. From https://www.plasticscm.com/features/index.html:

"Eclipse programmers will use the Repository Provider that implements the key version control capabilities integrated in the IDE. [snip] We support up to Eclipse 4.4 Luna. [snip]Same holds true for Eclipse-based IDEs such as LPCXpresso and Eclipse RCP."

CFBuilder would seem to be of the ilk referred to in that last sentence.

Finally, note that they point out later on that page yet another feature for working with Plastic that would work with ANY IDE. More at:

Plastic SCM - Transparent SCM