Can't install a removed app I installed an app named 'dayone' from App Store earlier, and then I was told that my OS(version 10.11.6) was not compatible with the current app version. So firstly I removed the target app, hoping to re-install that app later after upgrading the OS, and then did the upgrade(version 10.14.2)

However, after I upgraded the OS, I found that the app is still in the Updates list of the App Store panel. Clicking the UPDATE button won't install the app or update the app(there's nothing to update anyway since I had already removed it)

I suspect that the app was not deleted completely in the first removal, but I can't find anything about the app left in my mac.
Also it could be an OS bug?

Could anyone please help?
Thank you so much in advance.
I'm assuming you installed Day One v2.  According to Day One, there's a specific way to uninstall the application.  I think you just need to delete the folder indicated in #2.


  
  Quit Day One Mac.
  Paste this into the Go to Folder window in Finder: ~/Library/Group Containers/5U8NS4GX82.dayoneapp2/.
  Drag the entire folder to your Mac Desktop. (This contains a local copy of your journal data backups and might be useful if any problems arise when you reinstall and reimport your data into Day One Mac 2.0.).
  Drag the Day One Mac 2.0 app from the Applications folder to the Trash Can.
  Be sure to quit Day One Helper in the menu bar if necessary.