Unreal Engine 4.5 Preview!

[=JordanN;160433]
I’m thinking of upgrading to 4.5 so I have a question. When you download the new version, does it automatically delete/replace the older UE4 version that’s saved on your computer?

I’m still rocking the March 2013 build so I have no idea how the upgrade works. Also, are there any major concerns I should look for between UE4 March version and UE4 4.5? I’ve heard of things like screen space reflections have a bigger performance cost in the later version.
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After you upgrade the launcher, you will see a button to ADD another version of the engine (you can have several versions of the engine installed.) way you will not overwrite 4.2 or whatever version it is you are using.

After installing the new version of the engine, you can open it and then import your projects you made with the older engine version. It will ask you if you want to make a copy or convert in-place. I suggest you make a copy, in case something breaks.