almost 5 years ago
dank0, similar to the reply to Gregory above, please be sure you've fully uninstalled any older versions of RetopoFlow before using the new version.
If after doing that you're still running into issues then please report them to the bug tracker: https://github.com/CGCookie/retopoflow/issues
Reporting bugs is the single best way to help us help you; being the creators we're often too close to the development and aren't able to test all the many, many different ways that people use our tools. By reporting bugs you're not only helping us better understand your workflow, we're also able to more quickly fix the specific issues.