Google Chrome allows to create several profiles. Have you created a new profiles in Chrome or you use the default one?
Check some points:
1. Try to uninstall Sticky Password extension from Chrome (right click on SP button in Chrome and choose Remove from Chrome menu), and then install it from Sticky Password settings.
2. Allow Sticky Password extension in Incognito mode in Chrome. Make sure that it's only one allowed in Incognito.
Then open an Incognito window and check whether Sticky Password button in this case.
3. Close Sticky Password, run Chrome and press Sticky Password button. Whether Sticky Password will be lunched from the button?