How do I get the latest version of agent desktop?
If you click on the settings icon (gear) at the top right and drop down to about, you can click on download next to the version.
If you want a quicker route with no login you can always use the below URL format for a direct download.
https://YOURTENANTNAME.brightpattern.com/agentdesktop/download/BPClientSetup.exe
I hope this helps.