I succeeded by doing this.
1- download gibbed for ME3, I used (all-r46_b59.zip)(it is just a editor, no virus ou piracy, dont worry)
2- start a new game + and save as soon as you can (running after the reaper invasion)
3- alt+tab/exit , open gibbed, OPEN/(choose the save game you just made)
4- seek SQUAD / PLAYER / CLASSNAME
5- it will looks like "SFXGame.SFXPawn_PlayerAdept", change Adept for Soldier or whatever class you like (remember the capital letter ex: A for Adept, S for Soldier)
ok class changed...
6- seek SQUAD / PLAYER / IsFemale
7- Change to True or False (F or M)
8- Save (new save for safety) load the save you just edited..
ok... it is done
1- don't know how to change face after change gender.. for me it became Bald and ugly so use:
- seek SQUAD / PLAYER / Appearance / Has Morph Head
change to false.. and it will be the standard shepard appearance
2- worked for me, but I dont know the long term stability of the game/history since shepard may romance with a female only character on ME2 and than change over by ME3... and other unforeseen errors.
3- I believe it can work on any save game
4- remember to use the reseted character points...
My save is ME1 --> ME2 --> ME3 --> ME3+ so if I encounter any error I tell.Ow.. and change the name/class on the save game folder or it will show as the old save mane/classC:\Users\***\Documents\BioWare\Mass Effect 3\Saveex: from this Nynph_12_Adept_140312_20da5f5 to this John_12_Soldier_140312_20da5f5 - the change name is also on gibbed just look for name... =]
[Edited by jack_sands, 3/14/2012 7:28:14 AM]
change the name/class on the save game folder or it will show as the old save mane/class
C:\Users\***\Documents\BioWare\Mass Effect 3\Save
ex: from this Nynph_12_Adept_140312_20da5f5 to this John_12_Soldier_140312_20da5f5
- the change name is also on gibbed just look for name... =]
Anyhow, after playing a bit it fixed itself, guess some auto-saves and chapter saves got updated and it started to show up with the new class.
I still don't know why the change class/gender in NG+ should not be allowed by the game