Reverse engineering - confirmed for version 3!

[Edward Mendelson <dmarc-noreply@xxxxxxxxxxxxx>]

I'm delighted to report that xyghost's assembly code for Xy3.58B builds 
and runs! Xyghost sent me the assembly code and a batch file that builds 
it, using MASM 4.0 and LINK 3.64 (which I found in the MASM 5.0 bundle). 
After I put the executables in the right places, all I needed to do was 
run xyghost's batch file, and a few seconds later, a working editor3.exe 
was created.
I used DOSBox-X as my build environment, and needed to run LOADFIX 
before running the batch file, in order to avoid the dreaded "Packed 
file is corrupt" message from link.exe. I also used vDos, which also 
worked but was slower, and has the slight disadvantage of reducing the 
long filename of the batch file to an 8.3 name.
Well done, xyghost! This is really an amazing achievement - a 
staggeringly amazing achievement.
(P.S. I can't use it for anything, because if enter the NE command, it 
tells me to log in, but presumably that is Working as Designed.)