I created my own custom theme. When I make some changes to it and upload it as a zip file in the administration panel I receive a message like "theme installation failed - destination folder not empty". This of course is true, the folder holds the previous version of my theme and I want to update it.
So now I first have to change my active theme, then delete my custom theme, then upload the new version and activate it again. Is there a smoother way to update my custom theme? I tried incrementing the version number in style.css, but that does not matter.