How do I update KSP?

[astrokerb]

Hi guys1 seems like I'm in this part of the forum rather frequently, doesn't it? Anyway, I don't know how to update the game without downloading a fresh copy from the KSP store;.;. I could use some help, as i'd really like to make seaplanes and use the tiny jet engines, as well as keep my current ships and saves. Oh and as long as I'm here, I know how to make a backup of KSP but not how to use it. Any help on either problem would be appreciated(but the first one is more urgent).

[Vanamonde]

This *is* how one gets an update from the store. They've had some trouble with the patchers.

[UmbralRaptor]

If you have the store version, the best approach is to redownload it entirely, and unzip in the desired directory. This also makes it very easy to keep backups. (Make as many copies of each save, craft, version, etc. as needed)