only create shortcut if it doesn't exist

Install-DeltekVision.ps1

@@ -1,3 +1,5 @@
+$SHORTCUT_PATH = "${Env:Public}\Desktop\Deltek Vision.lnk"
+If ( -not (Test-Path $SHORTCUT_PATH) ) {
     If ( $VisionURL ) {
     
         ## Get the path to a compatible browser
@@ -20,9 +22,11 @@ If ( $VisionURL ) {
     
         ## Create the shortcut
         If ( $BROWSER_PATH ) {
+            
                 LogMsg "Installing Deltek Vision using ${APP_NAME}"
                 Create-Shortcut -Path "${Env:Public}\Desktop\Deltek Vision.lnk" -TargetPath $BROWSER_PATH -Arguments $VisionURL -Description "Launch Deltek Vision"
         }
         Else { LogMsg "A compatible browser could not be found: ${BROWSER_PATH}" }
     }
     Else { LogMsg "No URL to Deltek Vision was specified!" }
+}