Twiddlebit software was originally provided as shareware and required payment and a registration code to be entered into the software to enable full use. As of November 2017 all software is now freeware.
If you are using a shareware version and need a registration code, feel free to use the following to enable full functionality:
|Plan for Windows||freeware||05909|
|Plan for Psion||freeware||uBErKLrR|
|Plan5 for Psion||freeware||cUReTDdE|
|Plan for Nokia||freeware||m3pfafybbpf|
|Plan for UIQ||freeware||32277|