For anyone suffering issues getting Monolith's AVP to run even after following the installation of the All in One Edition, and installing the Master Server patch, follow this instruction here:
Use the files attached to this post put all in your Monolith's AVP directory folder, if you desire to use modifications first create a folder called "custom" in the AVP directory, place your modifications in that folder. Then open the launcher and tick "Always specify these command-line parameters" on, then in the box above that enter your list of AVP modifications, such as "-rez custom/X.REZ -rez custom/Drone.REZ -rez custom/Runner.REZ -rez custom/A.REZ -rez custom/B.REZ -rez custom/C.REZ" for example.
For activating the modification of your choosing "-rez custom/X.REZ" specifically, just exchange "X.REZ" for the name of the modification of your choosing for instance "PROJAM.REZ" instead, apply this repeatedly as applicable to your own set up. Or you can add new entries entirely such as "-rez custom\PlagariusPraepotens.REZ" but remember that the following entry will always take priority over the prior entry.
I have also attached my XPadder configuration if you wish to play it with a Xbox type Gamepad or Controller, the main profile in the AVP.zip's already set up for use with this application to be launched alongside the game itself "BlueMarsalis" with "BlueMarsalisMK" being configured for Keyboard and Mouse, I hope this helps.