@ gdiloren
Mine is detecting my firefox 2.0.0.4 Unless you are using a different version, alpha/beta perhaps ?
You could consider the FEBEs extension which should save your profile amongst other things and you can restore that after reinstall.

@ Tech
My firefox is installed on my D drive so it isn’t in the default folder. However, the firefox profiles are usually in the C:\Documents and Settings\username\Application Data\Mozilla\Firefox\Profiles folder so are you saying that too is in a different location ?