1. Go to Control Panel\Programs\Programs and Features, select Centero Software Manager and uninstall it.
2. Go to Control Panel\Programs\Programs and Features, select Centero Agent and uninstall it.
3. Remove the applications brought by CSM from your SCCM console.
4. Terminate the CSM for SCCM service by going to https://preview.portal.centero.fi, Administration - Services.
Make sure that you a plan for updating or removing the CSM supported apps. All the applications distributed with CSM service have their built-in update system disabled. This means that if you have no other tool or method to update the apps they will not get updated.