[=mereagan2007;371525]
How do I get 4.9 upgrade ? cant seem to get it to upgrade even by re-downloading and reinstalling.
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In Library tab, Next to Engine Versions heading, click Add Versions. This will create a new Engine slot along side your current one, with a drop down list that will allow you to choose version of Engine. It should default to latest, i.e. 4.9. Click Install button, and download will start.
Launcher is designed to download Engines side by side, so you can have different versions installed at once. Why? If you make games for a living, you may be working on multiple projects, with different requirements. You may have customized Engine to far to safely bring game to a new version, so this lets you start on new projects with a new Engine version, and either maintain other game in its version, or slowly port necessary portions to new Engine. It also allows you to have game running in two or more engines to compare performance and other things. You might also want to use different versions of Engine for than for Android than for Windows, as newer versions tend to drop support for oldest devices.