Yes, so I programmed the Detune rotary dials to go from 0-63, but on the synth I'm pretty sure Detune shows -31 to +31 (not +32) in the display, and somewhere in the middle of the 0-63 stored range is zero detune.
If anyone is within driving distance of Chuck Levin's Washington Music Center, we are local - could pretty quickly figure out what's what, and I'd bring my Take 5 to do a side-by-side sonic comparison with your TEO-5. Send me a private message about that.
I've been developing panels on Macs with the precompiled Ctrlr 5.3.198 binary - used that successfully from Mojave to Monterey, and more recently also on Sonoma (I don't have Sequoia installed anywhere yet). I don't currently use Windows PCs for music, but I had opened some of my panels with Ctrlr 5.3.201 on my Win11 laptop just to make sure that worked (and it does, no issues). I just installed 5.3.201 on an older Win10 laptop, and yes it also works fine with the TEO-5 panel (downloaded directly from GitHub). "Can't parse the XML file" sounds like the panel file was truncated or otherwise mangled during download. The file size and contents need to match what's showing on GitHub. Panel files are XML, which is a text file - can be viewed with TextEdit, Notepad, or any other text editor.
btw I'd been waiting to make a user manual until the TEO-5 panel could be tested against hardware; until then, it's a clone of the Take 5 panel, it works pretty much the same, so see the Take 5's manual