This source code is a new constructed source code and is not an update from the previous mpwa entrance (legacy variation). Although the design and look are similar to the previous legacy 5 variation, the backend and structure are really different.
Some functions of mpwa beta are
Assistance, multi-device beta,
Multi Number (More than one phone number can be included on a single website).
Send messages, images, files, buttons, and message design templates (button link/call) naturally with the API.
Auto Reply Text messages, image messages, button messages, and message templates
List of Contacts/Numbers, grouped by tags.
Blast text messages, image messages, button messages, and message design templates, Blast by group or whole number.
Using the $variable to call the name in the blast
https://1drv.ms/u/s!Ai2kfERrQ29dgyLBnI2nvv7lotAk?e=DkPxqd