First off - I know its an old version, just havent updated in a bit, and now i need the 2D tools(a waste of time for me to write my own, when theres already something there). I have no idea how to port a 4.1.2 project to 4.3.1, and the unity site says specificaly not to use finder to move it there. Do i have to do some special export of my project, or does 4.3 automaticaly recognize it and open it as normal? Also does anyone know how i can revert it if something gos wrong in 4.3? Because ive heard some people say there projects have broken after upgrading. Thanks!
EDIT : Does anyone know how to properly backup the unity project?
[Disclaimer: I’m still using 4.0]
In general, Unity uses the standard “upgrade in place” method. A newer version of Unity will auto-upgrade the project. This “destroys” the older version, so a good idea to back it up first (and Unity gives the standard, very explicit warning before converting.)
I upgraded a sprawling project from 3.5(?) to 4.0 and it was (mostly) fine. Upgrading within the 4.0 series should be even more reliable. But you never know. You may have been using a bug that they fixed.
A rule in most software use is to never upgrade mid-project w/o a good reason; to plan for a general retest; and budget time over the next weeks for upgrade weirdness.