In order to do a backup of all settings in SoftRadio, what files do I need to copy on the operator PC.

The executable files for a Mimer installation are installed in:
C:\Program Files (x86)\MimerSoftRadio

There are also audio files and other files in:
C:\ProgramData\Mimer

All settings files and script files are stored in:
C:\Users\Public\Documents\Mimer
(Might also be subfolders with more information)

Positions for windows and other user settings are stored in the register under the key:
Computer\HKEY_CURRENT_USER\Software\MimerSoftRadio

Some settings may also be stored under the key:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\MimerSoftRadio

On a Tipro PC the settings for audio and keys are stored in a file with the end .lay. Often called “Mimer.lay”. It is in the folder: 
C:\Users\Public\Documents