Change the desktop file to current standards.
--- a/application/pdfchain.desktop
+++ b/application/pdfchain.desktop
@@ -1,6 +1,4 @@
 [Desktop Entry]
-Version=ALPHA
-Encoding=UTF-8
 Name=PDF Chain
 GenericName=pdfchain
 Comment=GUI for the PDFTK - A graphical tool for manipulating PDF
