Hi Paul,
Thanks for the news. That makes sense, because if it was really not working I would not have more ideas.
If the saving process is that slow then I think it is probably because of an antivirus software or the Windows Defender is messing with the profile file, so it delays the process every time the UCCNC writes in a new key.
If you have an antivirus software installed then try to disable it temporarily to see if it makes the saving process faster.
Also check if your antivirus software has an exclusion list from check and add the UCCNC and it's folder.
Also check the Windows Defender and add an exclusion for it for the UCCNC.
To do that type Defender in the Search box in the Start menu in your Win7.
Then click the Windows Defender and on the Defender Windows click Tools and then Options and on the left you will see an Excluded files and folders menu item, select that and then add the UCCNC folder and UCCNC.exe file.