FF6Tools - Browser-Based ROM Editor

I was wondering if this was compatible with the "Old Ver." Steam release. I noticed on the Github that it mentions "ff6j-steam", but Everything mentioned in one of the Closed Issues tickets that support for the EXE file wouldn't be added, so I am unsure if that means just the EXE file or the entire game itself. If it does support editing the "Old Ver." Steam release, is it possible to do the following?

-Move the Fairy Ring's location on the Ghost Train so it is obtainable and change it back from the Potion it was changed into
-Make enemies vulnerable to Slow/Image so when they cast Haste/set Image (Storm Dragon II in Dragon's Den) on themselves it will work
-Add the Jump 2x damage bonus to the Gungnir and Longinus spears
-Add the Gauntlet/Blizzard Orb/Berserker Ring/Black Belt effects to the Bone Wrist*
-Change the Death Warden fight in the Veldt Cave chest to the one used in the Soul Shrine so it appears on the Veldt much sooner
-Make Siegfried and Typhon fights appear on the Veldt after encountered
-Swap Rages around so I can put the Tonberries Rage where I can use it
-Fix the Imp Immunity/Rippler bugs**
-Make it so when Umaro throws Mog, he deals 3x damage as he was intended to do**
-Buff enemies HP and alter any AI scripts that have enemies use desperation moves at a certain HP threshold, so desperation moves are used at a threshold with identically proportional HP

*If I do this, would the Berserker Ring also give the elemental resistances and +5 Strength to the Bone Wrist?
**If I can't edit this with the program, can I hex edit these changes if people have indeed figured out what the fixes are?