killing QOwnNotes.exe when updating in Windows

CHANGELOG.md

@@ -3,6 +3,9 @@
 ## 17.10.2
 - fixed that the automatic closing of brackets is only allowed if the cursor was
   at the end of a block (was removed by a pull request)
+- the `updater.bat` in Windows now kills the `QOwnNotes.exe` process when the
+  application is updated because it doesn't seem to end in portable mode
+  (for issue [Issue #376](https://github.com/pbek/QOwnNotes/issues/376))
 
 ## 17.10.1
 - the automatic update dialog will now also be disable per default for 

appveyor/update.bat

@@ -10,6 +10,13 @@ set portable=%4
 set unzipCommand=%unzipExecutable% -o %source% -d %destination%
 set qownnotesCommand=%destination%\QOwnNotes.exe --after-update %0 %portable%
 
+rem wait two seconds to kill QOwnNotes.exe
+timeout 2
+
+rem killing the QOwnNotes process because it doesn't seem to be killed in
+rem portable mode
+taskkill /IM QOwnNotes.exe
+
 echo %0 %*
 echo ======================================
 echo Updating QOwnNotes in folder: