Default [Q] Updating Cyanogenmod

Hi, sorry if this question has been asked in this thread before but I had no luck finding it. I downloaded a nightly version of CM11 and it's fairly buggy, sometimes fast, sometimes dead crawl slow, etc. I would like to update to a newer nightly version without losing all of the stuff I've worked this past week to finally get together (tweaks, apps, new pics, memos, etc.) Is there anyway to update the version of Cyanogenmod without changing everything/wiping my data? Such as ROM Toolbox or something like that? Thanks