fix: Windows NSIS One-Click Setup Launched while App already running in background

Closes #617

Author: develar

templates/nsis/allowOnlyOneInstallerInstace.nsh

@@ -26,7 +26,7 @@
   ${nsProcess::FindProcess} "${APP_EXECUTABLE_FILENAME}" $R0
   ${If} $R0 == 0
     MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION "${PRODUCT_NAME} is running. $\r$\nClick OK to close it and continue with ${MODE}." /SD IDCANCEL IDOK doStopProcess
-      Abort
+      Quit
       doStopProcess:
         DetailPrint "Closing running ${PRODUCT_NAME} ..."
         ${nsProcess::KillProcess} "${APP_EXECUTABLE_FILENAME}" $R0