Uninstall via Atlassian Universal Plugin Manager
If you are not familiar with Universal Plugin Manager (UPM), please read this document before we begin.
1) Log in as administrator and go to Administration->Add-ons->Manage add-ons
2) Search for `Kepler Custom Fields PRO` plugin in `User-installed add-ons` section and click on `Uninstall` button
3) Press `Uninstall add-on` when the uninstall confirmation dialog box appears
4) A message "successfully uninstalled" should appear
