We have just updated this, including a number of bug and usability fixes that were not ready for last weeks release. A number of people reported an error during installation:

C:\Windows\system32\msvcp71.dll

An error occurred while trying to replace the existing file:DeleteFile failed; code 5. Access is denied.

Ignoring the error and proceeding with the install did not appear to cause any problems with sending faxes, but nevertheless this error should no longer appear during installation.

The update is available via the customer system.

Finally, thanks to everyone that took the time to send in feedback on this new add-on, we will try to incorporate as much as possible into future updates.