Hello,
Please download and install the latest 3.6 RC version of FlashFXP through the Customer Portal's download section. You can access the Customer Portal using your registered account which should be the same login as the forums.
Once you do this, go to Help/About and then the details tab within FlashFXP. Note the Program Folder and Data Folder locations and make sure that your user account has full write permissions to both folders. If RC2 or later has been released you only need write permission to the Data Folder (this is the fix Bigstar referenced).
If you still cannot register the software please send an email to
support@inicom.net or preferably a contact us form message to support about the issue and include a description of your error and sequence of events. If you do not hear back from us via email please go ahead and PM me.
-Chris
iniCom Networks Support