The problem with making them unmanaged is that the best way to ensure they are fully unmanaged is to just uninstall/re-install the client from the download ISO from Part 1. Than they would need to be configured. If this is something you can do than that would be fine.
I'd be more curious as to the issues going on with Peachtree. So this is the SEP client that is having issue with Peachtree? I'm puzzled as to why just re-installing the client seems to have corrected whatever the problem was.
I forgot to ask but what version of SEP is this?