more fixes

Author: unalignedcoder

CalibreImport/Setup.ps1

@@ -1,5 +1,6 @@
 <# CalibreImportShellExtension Setup file.
-    This script registers all DLL files in the directory as context menu handlers for various file extensions.
+    This script registers all CalibreImport Shell Extension DLL files;
+    Registration creates context menu handlers for Calibre file extensions.
     The script can be run with the following arguments:
     -i: Register the DLLs and add registry entries.
     -u: Unregister the DLLs and remove registry entries.