1 – Please update your RDPlus to the latest version, reboot the server and try again.

You can get the update here :

Make sure no users are logged in before installing this update, you can check for remote users by launching a task manager and clicking on the users tab. 

Disabling your anti virus is also recommended. 

Make scan exclusion rules: 

– on C:\wsession 

Рand C:\Program Files (x86)\RDPlus\UserDesktop\files 

and make sure your users have sufficient rights to read and execute all programs in these folders.

2 – If it still doesn’t work, then it means that a Windows update has impacted the RDP connection module and has overwrited the RDPlus settings.

– open a DOS command prompt as administrator

– navigate to the RDPlus\userdesktop\files installation directory (cd “c:\Program Files (x86)\rdplus\UserDesktop\files”)

– run ‘svcac.exe /updatekernel’

– after the popup, open the Windows Services Manager

– restart the Application Publishing Service

After that you should return to normal operation in multi-session mode.