Different Google Calendar extensions
Hi I'm Jason Savard the developer of the calendar extension "Checker Plus for Google Calendar" and not the developer of the extension called "Google Calendar" which was recently announced that the developer Manas Tungare will be unpublishing. You may have been confused because my name appears in a comment on the unpublishing note.
I welcome you to try my calendar extension, it also has the agenda view and many more views and options. It's also been around for 10 years and I support all my users everyday with fixes and new features.
You can install it from the Chrome Store here:
https://chrome.google.com/webstore/detail/checker-plus-for-google-c/hkhggnncdpfibdhinjiegagmopldibha