When you add the DS-REM-CTRL in the Dewesoft setting and get an error that says "PoKeysLib.dll not found", first check if you have this DLL file in your addons folder "C:\DewesoftX\Bin64\Addons64" or "C:\DewesoftX\Bin64\Addons64\RemoteController".

If it's missing, please contact support@dewesoft.com to distribute it to you. 

If the problem still persists and you have the DLL, then convince to have the latest Microsoft Visual C++ Redistributable installed. To get the latest one, head to this web page.