1.7.4

BUGFIX: FX view caused a crash when clicking the reverb tap panning dial
BUGFIX: (Windows) Theme loading failed if the theme (binary) path contained other than ASCII characters
BUGFIX: Fixed crash after clicking instrument program when focus was in instrument name
ENHANCEMENT: The KLYSTRACK environment variable can be used to set the resource path (where res/ and key/ are) on all platforms
ENHANCEMENT: If theme files are not found a native message box with an understandable message is shown
ENHANCEMENT: Recently opened files list in File menu
ENHANCEMENT: Added new example song (Starport2.kt)