Clowns - they have been advised to NOT install beta 5. I believe Taylor Broad provided them with a link to the correct phpVMS download to install.
Personally, I'd never go asking them to install or fix anything phpVMS related. It's not that they are incompetent, but phpVMS isn't their specialty.
In the phpVMS Discord, visit the #v7-releases channel.
Scroll to the bottom. The last entry (from 12/6/24) presently shows 7.0.46.
Click on the 'zip' to download the file to your desktop.
Filezilla is fine for editing files and moving addons into phpVMS - But it's easier and quicker to use cPanel's included File Manager to upload the phpVMS dev zip file.
Here is a link to the docs for phpVMS 7
https://docs.phpvms.net/
Since you have an existing install, click on 'Installation', then 'Updating'.
https://docs.phpvms.net/installation/updating
Read thru that short section on updating.
You will be uploading the entire zip file to the root of your phpVMS 7 install (the one with the .env file in it.
Make a backup of your site! Skip this at your own peril. At a minimum, make a backup of the .env files. Also, make note of any changes you made to files in the /config folder - I recommend making a backup of this as well and checking to see if there are changes to any of those files which might need to be copied over.
On your remote site (through your FTP client or SSH), delete the vendors folder
On your remote site (through your FTP client or SSH), delete all of the files in bootstrap/cache and storage/framework/cache (delete the contents, NOT the folders)
Upload all of the files (or upload latest build via your file manager and unpack), and overwrite everything.
If you are using composer, then run composer install command via shell/terminal
Visit the /update URL of your site (e,g http://myva.com/update) to complete the update/installs
Check the changelog for template changes so you can update your skin
Follow the instructions - except #5 as you are uploading the entire zip - to the letter.
The final step is to go to admin, maintenance and clear the cache.
This should bring your phpVMS up to date.
Airports, aircraft, flights (schedules) will need to be added manually.
I believe you can upload a few airports, aircraft and schedules - then export them and edit/add to them using Excel (or similar) in the CSV file format and then re-import them with your changes/additions.
Be sure to follow the format in the CSV files exactly or you will have issues with missing data.
I'd suggest getting the base phpVMS system working first and then concern yourself with addons (theme, modules).
As for SC3, there should be a Web or Module folder included which you (as the site admin) would upload to the phpVMS 'modules' folder. This will allow you to test SM3.
The above should at least get you started with the basic system and SM3.