Upgrading

Homebrew (Mac)

brew upgrade plenti 

Snap (Linux)

Snaps will update automatically! If you want to force a snap update to the latest version, you can do the following: 
snap refresh plenti 

Scoop (Windows)

Windows is not yet supported, it needs your help
scoop upgrade plenti 

Manual

1. Download the latest release 
2. Replace the existing file in your PATH (most likely /usr/local/bin