Mailing List Import

I have a project that is sort of hard to explain, but I will do my best... About a year ago, I purchased a single license of Mailing List Manager Gold ([login to view URL]). It is installed and works fine, but does not seem to have an option of importing users from an excel file. I have tried to contact the makers of the program several times and have heard nothing. I do not know much about MS Access... but I am wondering if someone can go into the .mdb file and add users, or if it's possible to add an option to import users via excel. Thanks in advance....