-better internal handling of aliases
-added: "Save Scheme as..."
-changed: Strg+S invokes "Save Scheme" instead of "Save Scheme as..."
-changed: Shift+Strg+S invokes "Save Scheme as..." now
-added: Scheme Modification Management (Display Modification Status, Confirmation to save changes on exit, ...)
-changed: When entering the "Change Alias" Dialog the proposed Alias-text now equals the filename without extension
-customizable display of PlaySlots
-fixed: file continues playing a few milliseconds after end of file
-added: WMA extension in the bulk open dialogue box
-fixed: access violation when opening keymap
