Changes since 0.2.x

Split the UI into three tabs: Release, Beta and Imported.
Added a small progress indicator to the bottom right of the window that shows what's happening during application load. The bar is invisible most of the time.
Fixed various issues that could occur when importing the same version twice.
Fixed possible loss of data when a target folder for importing a version already exists, but doesn't contain Minecraft game files.
Fixed crash when importing a file that isn't an appx.
Improved error reporting when failing to download versions due to beta programme issues.
Added a setting in the Options menu to disable automatic appx deletion post-install.
Added some useful options to menus:
- File -> Open log file opens the launcher's log file in Notepad, useful for debugging
- File -> Open launcher data folder in Explorer
- Options -> Delete appx after download to save space
- Options -> Uninstall all versions
- Options -> Refresh version list
Versions newly added to the list are now marked with (NEW!) until the version list is refreshed or the launcher is restarted.
Improved error reporting when unable to connect to mrarm.io.
UI progress now differentiates between "Registering package" and "Launching".

Provide feedback