I'm almost sure I tried that with the previous app version and it didnt worked for me, in fact, that option seems to have no effect what so ever.
If your 3D editor already exports DAE files with an up vector of (0,1,0) then the Y-up conversion won't do anything.
Another option that doesnt seem to do anything (at least not when importing to GR2) is the mirror option.
I'm not aware of any mirror option, at least not in the exporter :O
1. Some armors, if I just export to DAE and immediatly to GR2 (not even editing/exporting in any 3D app) don't show up in the game. One example is PL_M_ARM_Leather_B_Torso_A.GR2
I'll look into it.
2. Some armors that have 2 parts/objects, if edited (for example, delete a vertex) when exported doesnt work either. PL_M_ARM_Leather_A_Torso_A.GR2 is an example for this.
Can you attach a modified and an original DAE for this?