Luckily for you, this very long thread contains a way to upgrade from this mod to the SMF 2.0 inbuilt custom profile fields.
Just search this topic for "Guidance"
It can be tough to find replacements for favorite old mods in the newest version. I feel the same concern about my favorite gallery mod.
Sooner or later, though, you are going to want to make that leap.
You can get lots of information on upgrading mods on the various mod boards -- for the new mods you want to move to.
And also a lot of general upgrade information on the general support boards.
You'll be fine.