De-gooing a character can be done with a simple json editor.
Find Character>PC>statusEffects.
You should see a series of lines starting from 0.
Find and delete any of the ones that have the following in them:
Gel Body
Goo Crotch
Goo Vent
Omit Cumflation Messages (if you have cumflation disabled)
In the Character>PC section:
Find skinType and hairType and change them to something other than three (0, 1 or 2 should be regular skin/hair. I can't remember which one)
Find skinFlags and delete the line with 3 entirely.
For tails, find tailFlags and delete the line with 3 entirely.
For genitals, under flags, delete the line with three on it entirely.
Finally, skipping the Character section entirely, under Flags, find Goo_Biomass and delete the line entirely.
I think that covers everything.