Hi guys,
I am upgrading from 4.0.1 to 4.1 version. I was hoping, that now in 4.1 we have a fix to the problem, when you built the engine from source, and the launcher still wanted to download it again. However, it is not fixed. What is worth, there is, apparently, no way to upgrade the project files from 4.0 to 4.1 without installing engine via launcher
There should be a button in context menu, which lets me upgrade project file, as it is written here.
And this is the only way to upgrade, as far as I know. But I don’t have that button, so I guess now I have to install the engine from launcher.
As a result: I have to install/build 2 instances of Unreal Engine 4 in order to make things work and continue the development. I hope this thing can be fixed in the future.