How to install several IDE version on my PC
Arduino.cc have a guide :

https://www.arduino.cc/en/Guide/PortableIDE

The gist is:


Download the desired version in ZIP format
Unpack the content in the zip file to a folder
Start the arduino.exe in that folder.


Remember that you have to place all libraries, board definitions in that folder.

The folder can be copied to another computer or a USB stick....