Does anyone know how I can go about updating the version of wine that one prefix uses without self-destructing everything in it?

I want to bring it from 1.4 to 1.5.5 - I read on a forum that someone got the microphone working in Rosetta Stone with Ubuntu 12.04 and wine 1.5.5.

Thanks for any guidance on this matter. :)

http://ubuntuforums.org/showpost.php?p=11984993&postcount=20

Update: Issue resolved. Thanks to zuberuber I was able to approach the issue in a different light. :)

I made a new prefix called "test" in PlayOnLinux. I compared the new prefix with the Rosetta prefix. It contained a PlayOnLinux.cfg file along with the reg files. It contained:

ARCH=x86
VERSION=1.5.0

I copied this over to the Rosetta prefix and adjusted it:

ARCH=x86
VERSION=1.4.1

After doing that, I was able to change it from 1.4.1 to 1.5.0. I confirmed it in the prefix's winecfg's About tab.