It is possible, as long as you have some comfort level with install wizard folder install locations and making desktop shortcuts.
During the XPression Install Wizard steps, you can select the install folder location:

If you install each version to a unique folder location, you can have multiple versions installed. For example, in the above wizard, I put it in a folder with 'V12' at the end.
Then, from the install folder, you can make a shortcut of the XPression.exe:

So you can create multiple desktop shortcuts that launch different versions of XPression.
As long as you keep track of things, and double check/test everything it will work well.