My TestController software supports the RD6006 and can also support RD6012 with a minor change in a definition file (As long as the protocol is the same).
That software do not look like a control panel, but it can control the supply and it can log and process data from the supply, together with a couple of other devices simultaneous.
It will run on Windows, Mac and Linux.
My website: https://lygte-info.dk/project/TestControllerIntro%20UK.html
BLF: https://budgetlightforum.com/t/-/61506
EEVBlog (Main discussion thread): https://www.eevblog.com/forum/testgear/program-that-can-log-from-many-multimeters/