tested it here and worked just fine.
Make sure you have the right plugin versions(On the plugin manager, click on the plugin with the right mouse button and refresh it, then send me a screenshot for me to see the versions):
- Eli MZ Book 5.4.17
- EliMZ CheckPoint 1.2.1
- EliMZ Check Point Window 2.2.1
If still the plugin does not work, you will have to create a sample project replicating the issue and upload it to me so i can take a look.