A few simple questions

I am fairly new to all this so please be gentle. I have read as much as I can and have done searches but the terminology is fairly foreign so it's hard to pick the right search terms and then understand what I am reading. I'm hoping direct questions will get me answers I can understand.

First: I am mining for someone that paid to have an alt coin made for them (X11) from someone on these forums. I wasn't involved until after then coin was created.

There are a few things that seem odd to me that I'd love to see resolved. First, any time I exit the wallet, it stays running in the background. This happens in Windows and Mac. I have not checked on Linux. I have to go into the task manager to kill the process in order to re-open the app. Second, the app feels like it may have been compiled with a very old copy of the LTC source and not very up to date.

I have the source code. Would it be possible to take the most current version of the LTC source and patch in my specific details, of this alt, and get a newer wallet? Things like my genesis block etc. Right now I am using a Baikal to mine at 150MHs and it's crashing the wallet. The wallet worked fine when mining with nVidia 980 at 11MHs. If I point the Baikal at a mining pool, it will run for days without issue. I would like to better understand the technology so that I don't ask stupid questions but this is where I am currently.

I will not say who made the alt coin because it's not really relevant to the questions I have. I don't want the post to get sidetracked.