Update NSIS Installer SCript for 5.1.6 Release version

Author: perdrix52

Installers/DeepSkyStacker.nsi

@@ -36,7 +36,7 @@ FunctionEnd
 
 !define DSS_PRODUCT        "DeepSkyStacker"		           # For start menu
 !define DSS_VERSION        "5.1.6"                         # For control panel
-!define DSS_VERSION_SUFFIX " Beta 2"				               # For control panel (e.g. " Beta 1" or "") - note leading space
+!define DSS_VERSION_SUFFIX ""				               # For control panel (e.g. " Beta 1" or "") - note leading space
 !define DSS_PUBLISHER      "The DeepSkyStacker Team"       # For control panel
 
 !define DSS_NAME           "DeepSkyStacker"