I probably wouldn't update the trainer just yet. There are numerous bugs, glitches and non-functional aspects (such as persistent time and vehicles not repairing) in Lifeline. Which may mean more patches shortly which will again break any trainer released.
I'm enjoying the challenge without a trainer. That whole running out of stamina thing is the only bit that bugs me though LOL
I thought lifeline wasn't having persistent time. I do agree trainer should wait though. There are a lot of wall glitches where cars and npcs get stuck as well as general pathing issues so I'm sure another update will be coming out sooner than later. Sucks because I was looking forward to playing this with a trainer but I'd rather wait for it to be more stable rather than the CH taking on the work load only to have it become useless a few days later. I'll keep watch on the undead labs forums they are generally very good with telling gamers what they're doing and when they're doing it.