Update Update-Pixelator-Version

Update-Pixelator-Version.-.md

@@ -80,7 +80,11 @@ The new code can be downloaded from `gitea.psi.ch`. There are 3 ways to do this:
 
 # Switch Branch (optional)
 
-If you wish to use a feature that is still under development, it might be in a special branch of the code (the standard branch is called `master`). To list the available branches:
+If you wish to use a feature that is still under development, it might be in a special branch of the code (the standard branch is called `master`). First, make sure that you are in the git repo directory:
+```
+cd ~/work/stxm-new-version
+```
+To list the available branches:
 ```
 git branch -a
 ```