Yes! Beta 3 works! Downloaded, installed, and already converting files right now!
(I was searching for that link but the ones I found were wrong).
Thank you!!
PD: Reality Capture Beta 3 is the last version that works with Catalina 10.15.7. (Tried installing Beta 4 just in case and it won't work).
gabicool
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Using the logic of the URL for Beta 3, by changing the number you can download newer betas:
https://developer.apple.com/augmented-reality/tools/files/Reality_Converter_beta_4.dmg
https://developer.apple.com/augmented-reality/tools/files/Reality_Converter_beta_5.dmg
Try one of those.