Question: Does any know how to get the RDP version Windows is running with?

Answer: 
Or you could Right click on the window and select About
![enter image description here](https://i.stack.imgur.com/CvjyF.png)
Here's a PowerShell query you can use:

```
wmic datafile where name="C:\\windows\\system32\\mstsc.exe" get manufacturer, name, version

```