When you click the Export to PDF option in Inspiration it attempts to print the mindmap using a printer installed on your computer.
Currently Inspiration Software are working on a fix for this but in the meantime you can use the following workaround:
- Click File -> Print
- Change the currently selected printer to the Inspiration PDF Driver.
- Click OK.
- You will then be presented with options that you can change such as where to save the file.
Once you are done, click OK.