Two Tor Browser instances on one Whonix-Workstation

Hello. I noticed that Tor Browser Downloader provided by Whonix doesn’t support installing two instances of Tor Browser. What if I want to test TB alpha but don’t want to remove stable TB? How do I install another instance of TB? Do I need to download TB tar.xz from Tor Project site? Are you going to add an ability to install two TB instances to Tor Browser Downloader? Thank you!

Whonix-Workstation Security Hardening - Whonix

but I’d safe the trouble and go for multiple workstations instead.