For now, until a new TE ( or Patch ) is available, I would ( my opinion only ) place TG's as the last set of fields.
This is because the TE crashes ( for me anyway ) when doing a complete Object Check on terrains with TG's in it. Placing them last will let you do a complete check of your terrain ( for errors and to correct them ) before placing the TG's.
( I know you can select different types of object checks which would prevent TE crashes because you would select everything else but the TG's check. )
Also, just as Tilt mention, you need to give us more information to help determine the possible problems for your TE crash.
NOTE! Min. requirements for Fields:
For a Fields you'll need at least
1 tower ( as for TG's I guess that F**SHP00 is your tower )
1 hanger ( and I don't mean the hanger building I mean a ENTPNT set as Hanger ... F**HGR00)
1 maproom ( and I don't mean the MPRM1 shape, I mean the MAPTBL1 shape set as Maproom ... F**MPR00 ) Remember you'll need to place a Maproom group somewhere ( remote area ) in your terrain for the TG's )
1 ENTPNT for either a Fighter, Bomber, Ptboat or Vehicle
So since you can do a Object check of your TG's just make sure you have at least these items.
Pokie