Can you change from the Proxy Edition to the MACH5 Edition of SGOS?

A.
Yes, and the relevant portions of the previous configuration are preserved.
B.
No.
C.
Yes, but the previous configuration is lost.
Explanation:
https://kb.bluecoat.com/index?page=content&id=KB1417&actp=RSS
I would choose C.
The A is when you change from MACH5 to Proxy Edition.
I have the same idea. C