Look for the RDP6 folder, located at C:\Users\Username\RDP6
Then run "ConnectLauncher.exe" with administrator rights, and select the connect file you want to read.
You will get this menu:

Use "Edit file". You will first get the descriptive info of how it works:

Click on OK,
Now you get all the settings contained in the connect file:

You can also directly use this file in attachement: ConnectLauncher.exe