Thank you. I think I figured this out.
Reasons why I haven't been able to update mfc-edit from 5.2 to 7.x are:
* My order page (from January 2017) / software download page has that version 5.2 only and sometime during this 5.2 installation, I changed the mfc-edit environment PATH (MFC-Edit UserHome) from ~/MFC101 to /User/Shared/Library/Fractal/MFC101 (and deleted ~/MFC101) thinking that prefs and dumps get saved there and that I don't ever manually have to open that dir. I personally don't want to clutter my home directory with application-specific directories. I also save a folders named "IR" and "SYX" inside /User/Shared/Library/Fractal.
* As you noted, 5.2 has an update bug so whenever I tried to update, it never actually did (even though it had downloaded the latest version into that MFC101 folder... and like I said, I never manually accessed that MFC101 folder!)
In hopes that I can replicate what I see, and for others who might've had the same issues, what I ended up doing:
* First, I installed from the dmg found inside MFC101 folder... Sure enough, like you said, there's a fresh installer. This installs version 7, and also creates ".mfcrc" in my home directory. I see that ~/.mfcrc saves the log path / PATH overrides
* But I wanted to make sure that I can replicate a correct, CLEAN installation, so I trashed the following: the mfc-edit app, ~/MFC101 and any other MFC101 folders I might've created for the mfc-edit installation (ex. /User/Shared/Library/Fractal/MFC101 in my case, which I created) ... and ~/.mfcrc that 7 creates...
(n.b., Actually, I saved some of my mfc dump / backup files in a temporary folder so I can reuse them later with a new mfc-edit installtion )
* Downloaded and installed 5.2 from my order page, dated January 19, 2017 The installer puts mfc-edit 5.2 in /Applications folder
*
* Launching this (...and without MFC101 folder) will bring up this dialog. Clicking on Yes creates the MFC101 folder. Say No to update.
* Quit the app, copied back my previously saved mfc dump/backup files into that MFC101 folder, relaunched the app... OK, so MFC-Edit 5.2 is running again.
* At this stage, proceeded with Update. What it does is, it downloads a new installer inside MFC101 folder. But the app quits! (i.e. the update bug in 5.2). So, locate that installer (which is obviously different from the version I got from my order/download page). And install it!
* Upon completion, the mfc-edit app in /Applications will be updated to 7.2...
* In an effort to always keep my directories organized, I moved the app to /Applications/Fractal Audio... which is where Axe-Edit, Cab-Lab, Fractal Bot, etc also live...
* I can confirm that by repeating above steps. 7.2 is working and I can load my old sys files from previous installations! Whew! :-D
Thanks again, and keep up the great work!