This worked for me, too! This should be marked as best solution. Everything else is evil or doesnt work.
ZimaXXX posted correct solution, please update
ZimaXXX posted right solution, you don’t want to be copying exe files to make this work…
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There are no Setup.bat in Rocket versions of engine (i.e. that comes from Launcher).
@rcdarcey You need to run it from actual Engine You want to associate it with.
c:\Epic Games\4.14\Engine\Binaries\Win64\UnrealVersionSelector.exe
(not from c:\Epic Games\Launcher\Engine\Binaries\Win64)
This is only way that worked for me. VersionSelector.Exe doesn’t exist within engine installation folder anymore (if it ever did)
What do you mean? ZimaXXX is suggesting copying exe file isn’t it?
Yeah, so that I used ZimaXXX’s solution for both my launcher and custom built version.
Thank you VERY VERY MUCH. I solved my problem!
Worked. Thanks
Refresh Visual Studio Project would only work if your project uses C++. Not a viable solution for those using blueprint only.
I think you meant to credit someone else. ZimaXXX is one suggesting to copy UnrealVersionSelector.exe to your projects folder (which doesn’t work) and you yourself said that this was a bad idea down below.
I’ve created a step by step guide on how to fix this down below.
My previous guide didn’t fix associations. I can confirm that using UnrealVersionSelector.exe DOES indeed work, you just need to put it in right directory which was getting muddled by some descriptions. Here’s a quick video guide on how to fix this:
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I have this same problem but how can it be solved currently in windows 10 professional? I have unreal engine 4.18.3
I provided a link to a guide on how to do same things in Windows 10. Check link for more info but it’s almost exactly same steps as Windows 7.
Sorry, my guide didn’t actually fix problem, it just forced files to open with engine but you were still missing right click context menu for engine. new video I put together fixes it completely for all versions of Windows.
Thank you very much for your video 
So I’m currently running newest 4.19.2 UE… problem I had was opening my project would always report crashing. Even starting a new Project would some times crash.
Here I have 2 projects both crashing moments before. So what I did was, locate appropriate engine for project (regardless if you have 1 or more engines installed. click drop down box and clicked on Set current. When you open project files, engine you set as current should say busy.
I tried renaming projects it worked once.
Typically if your projects are crashing then best way to fix any issues is to simply delete Intermediate and then Saved folders from inside your project directory. I always do Saved last as it keeps your window layout and it’s frustrating to re-do all of it if all you needed was to delete intermediate folder.