Download the installation file (ClipbirdMac.zip) from https://clipbird-project.com/download. Usually you will find it in the download directory of your browser.
If the update does not occur automatically due to updated security settings of the operating system, proceed as described below. In the download directory open the file „ClipbirdMac.zip“, which contains the file „Clipbird.dmg“. Open the Clipbird.dmg file and move Clipbird to the Applications folder: