diff --git a/fragments/arguments.sh b/fragments/arguments.sh
index 6c01519..ea4b471 100644
--- a/fragments/arguments.sh
+++ b/fragments/arguments.sh
@@ -52,8 +52,9 @@ if [[ $DEBUG -gt 0 ]]; then
 fi
 
 # How we get version number from app
-# (alternative is "CFBundleVersion", that can be used in labels)
-versionKey="CFBundleShortVersionString"
+if [[ -z $versionKey ]]; then
+    versionKey="CFBundleShortVersionString"
+fi
 
 # get current user
 currentUser=$(scutil <<< "show State:/Users/ConsoleUser" | awk '/Name :/ { print $3 }')
diff --git a/fragments/functions.sh b/fragments/functions.sh
index 490ee8c..88d0f3f 100644
--- a/fragments/functions.sh
+++ b/fragments/functions.sh
@@ -182,7 +182,7 @@ getAppVersion() {
             installedAppPath=$filteredAppPaths[1]
             #appversion=$(mdls -name kMDItemVersion -raw $installedAppPath )
             appversion=$(defaults read $installedAppPath/Contents/Info.plist $versionKey) #Not dependant on Spotlight indexing
-            printlog "found app at $installedAppPath, version $appversion"
+            printlog "found app at $installedAppPath, version $appversion, on versionKey $versionKey"
             updateDetected="YES"
             # Is current app from App Store
             if [[ -d "$installedAppPath"/Contents/_MASReceipt ]];then
@@ -353,7 +353,7 @@ installAppWithPath() { # $1: path to app to install in $targetDir
     # app versioncheck
     appNewVersion=$(defaults read $appPath/Contents/Info.plist $versionKey)
     if [[ -n $appNewVersion && $appversion == $appNewVersion ]]; then
-        printlog "Downloaded version of $name is $appNewVersion, same as installed."
+        printlog "Downloaded version of $name is $appNewVersion on versionKey $versionKey, same as installed."
         if [[ $INSTALL != "force" ]]; then
             message="$name, version $appNewVersion, is the latest version."
             if [[ $currentUser != "loginwindow" && $NOTIFY == "all" ]]; then
@@ -365,7 +365,7 @@ installAppWithPath() { # $1: path to app to install in $targetDir
             printlog "Using force to install anyway."
         fi
     else
-        printlog "Downloaded version of $name is $appNewVersion (replacing version $appversion)."
+        printlog "Downloaded version of $name is $appNewVersion on versionKey $versionKey (replacing version $appversion)."
     fi
 
     # macOS versioncheck