For enable apps you need to select

1. a profile specifying the Confluence server to deploy to (e.g. -PLOCAL, per convention, deployment targets are spelled in capital letters)

To check what will be run on the server, use -DdryRun to actually not execute the commands, but print them to the console.

> mvn apptools:undeploy -PLOCAL -DdryRun

You may specify default includes and excludes to select which apps to undeploy.

> mvn apptools:undeploy -PLOCAL -Dincludes=extension,core,model -excludesDexcludes=web-api,bookmarklets -DdryRun