Since I'm not about to create an account on Discord or Blogspot just for this, and neither is set up for Guest posts,
Bug Report for 7.4.7.1
Immediately on launch, it spews a fatal error "RGSS-RTP Standard not found".
A simple search comes up with the cause and fix, on the RPGmaker forums:
"that happens if you don't include the RTP in the installer when you prepare for distribution (that is a checkbox on the archive menu). In that case the other player has to download the RTP from this site (top under downloads) and install it before playing."
Since I have a functioning RPGVXAce already in-system, and a fresh reinstall changes nothing, this leads to a critical error by the Dev making it totally incompatible with VX Ace.
Looking forward to a working version, thanks.