The tech stack for app has been upgraded with new content along with UI/UX based on new trends, security & guidelines. Due to a major upgrade, you wouldn't be able to install new version on top of the existing one. Request you to re-install the app by following one-time instructions below. Sorry for the inconvenience caused.
* Make a note or take screenshots of all bookmarks from old version.
* Uninstall app.
* Install app from Google Play Store.
* Add bookmarks manually in the newer version.