Filename issue when using email button

Customer is using PDF Creator for a while. However, they are now experiencing issues with filenames.
When creating a PDF and use SAVE, no problem, customer is able to save the file as file.123.456.pdf.

When creating PDF and NOT saving, but using the email button, the filename changes: only file.123.pdf is remaining, the .456 part is removed from the filename in the attachement.
Workaround is to save the file, create a new mail, selecting the saved file with proper filename, but this is annoying.. Tested with both 4.0.4 and 4.0.3