What are best practices for upgrading a material template in progress from version 4.21 to 4.22?


I am creating a material template library of a manufacture’s materials in in version 4.21
and want to know best way to handle when upgrading to version 42.2?
Do I:
A. Open a copy in Version 42.2 and continue working on it there to make a template?
B. Start a new project and import material libraries from scratch?

Please note that my material library is an imported Substance Designer sbsar created materials, that
I plan on using in both 3ds Max and UE4 separately Due to issues of opening Substance To Physical
created library in 3ds Max - I will not be importing from 3ds Max.

Please advise and Thank you for any recommendations