I am no longer selling No Popups because I don't have time to support it due to other obligations. If you have obtained the program from a download site and would like to use it, here is a user name and serial number you may use:
User name: nopopuser
Serial #: NP21063-11
Just enter them via the File -> Registration menu.
Thanks for your interest in No Popups, and for your support of shareware!