I'm not completely clear on what you're asking for (do you mean how many powers you can select per level-up, or how many force points you get?), but if you want to change the number of powers you can pick each level-up, the .2da you want is "classpowergain.2da".
Also, you'd probably get a faster reply if you post issues like this in the Holowan Labs forum in the future, as this (T3M4's droid center) subforum is for issues with modding tools, not general modding help, as that is the purpose of Holowan.
I hope I helped.
--Too Dumb to Quit--