NVRAM Question

I tried Merlin's latest build and had issues with my VPN so I revered back to the _29 beta build which was fine for me. The issue now is my wifi is all screwed up and was fine before. I played with all settings, but figured I should clear the VRAM just to be sure. Can I do the following?
-Clear NVRAM, then re-upload my saved settings for the merlin build? Is there any expectation that the config will have to be rebuilt manually or am I ok to do this?

Thank You.