I'm not sure what Camplot is, but there is nothing holding you back. Mastercam is all you need to get the machine up and running . Mastercam v7.1 amd v9.1 are somewhat the same until you toolpath, then they are different animals. My advice is to use the most current version available. Maybe v7.1 will be ok for drafting, and 9.1 for drafting and toolpathing. Reason why is, I remember v7.1 as not having an operations manager, and if I remember correctly, doesn't save toolpaths in the part file, only an NCI file. If you are licensed for more than one seat of v9.1, start with a clean install of v9.1 on both computers. If you have modified the config file without creating a backup, a clean install will revert you to original configuration. If there is a post file for Camplot that is useful for your machine, add it to posts directory(you can select it from within Mastercam - if you really need it). I would say you are ready to learn Mastercam now. No other software should be necessary. Camplot sounds like an application to verify toolpaths, which you don't really need. Mastercam v9.1 has backplot and verify, which should be fine to verify the toolpath for function and safety. No third party software should be needed for any reason.