How to switch from isp manager panel to BrainyCP?

Question

System administration

how to do it correctly, what algorithm, made a backup of the database and files went to the site https://brainycp.com/download , how to change or delete the old panel and install a new one?
now mysql Ver 14.14 Distrib 5.7.31, for Linux (x86_64) using EditLine wrapper
Exim, dovecot, proftpd - yes.
Firewall - ufw and iptables, as we can see.

Answer 1

Panels are placed on a clean server. Everything and always.
Backup your sites and databases.
Format the server, install a clean system, then follow the installation instructions for the panel you need.
Install the panel, create your sites in it, upload backups.