I've created a guide for cpanel and subdomains xD

[EvoPulseGaming]

In Cpanel, goto Git™ Version Control and press create,
the clone url will be https://github.com/ondras/wwwsqldesigner.git
the repository path, is where you want to place your files (I put it into its own folder in /public/html)
and the name is whatever you want.

Then in Cpanel, go to subdomains, create your new subdomain and point its document root to where the repository path is in the previous step.

create a new .htaccess in your subdomains root and add:
<IfModule mod_alias.c> RedirectMatch 301 ^/$ https://yoursubdomain.yourdomain.com/index.html </IfModule>

Then in file explorer, change the permissions of your subdomain folder to 755

Then you can visit your subdomain and design!!!

Also, you can just visit cpanel git to update whenever new changes come out!

[EvoPulseGaming]

To get mysql save/load to work:

in cpanel goto MySQL Databases
create a new database
create a new user
assign new user to this new database

goto your subdomains root
view /backend/php-mysql/database.sql
copy everthing inside of that
in phpmyadmin, open the new database, go to the SQL tab, and paste what you just copied, and run.

go back to your subdomains root
edit /backend/php-mysql/index.php
Inside of that file, edit the defines in "function setup_saveloadlist()"
That would be the USER, PASSWORD, DB and TABLE defines.