When one of them ask to renew the contract it instantly crashes, help please?

I'm sorry for such question, but I novice in this game. Before played only, Abuse, Commandos and Desperados in this jenre. Maybe you know if there are structured and compact guide of this game. Cause I only start to play, hidden int the bush and turn on stealth mode, but enemy anyway saw me. If it possible to hide in this game? When started battle it and I wanted to use medical kit or camuflage it wrote that it is not enough action points. But I didn't find any action points. Where is this points indicate...

on classic, killed kingpin and all the troops in san mona but when i came back all sectors respawned with normal troops. Will this keep happening if i clear it again?

What is Wildfire? How is it different from vanilla game?

(period)