I currently have 1.3.13 and have a notice within wordpress plug-in section that there's a 1.6.1 version out; I downloaded it and have the zip file but how do I replace the one I have installed? Wordpress tells me it's up to date, but clearly it's a difference version. I have a license key but I just don't know how to proceed at this point and don't want to lose my existing forms. many thanks.