You are absolutely right! I was just copying the numbers from a plugin tutorial without giving it much thought. If I had googled for the keyword “krita activationFlag” at that time, I could have even found another useful discussion thread. (Setting up shortcuts conditions and activation flags for a plugin. - #2 by nickgeneratorfailed)
Thank you very much for pointing this out. I’ve updated the source code and the zip file.
Users of version 1.1 can now download the new v1.2 zip file, or manually change the value inside windowed_new_view.action to 0001.