No problem, glad it worked! Yeah, all you need is game.db which is your most current game save. If for some reason it doesn't load on your new server, you should go back through the backups and try uploading them (change the name to game.db) until one does.
Some versions of Windows have certain write protections in certain locations. It happens
Ah thanks, I see! This permission error is on your computer, not the server.
Are you running WinSCP as administrator? If not, that may fix it. If you already are, try saving the file in another place.
That file in particular isn't going to be useful to download, and might be harmful if you upload it to another host and it overwrites their files. I can understand why it's blocked and why SS doesn't want it modified.
All you need is the game.db file and possibly a few backups. Will those let you download them?
If you're trying to download the entire Saved folder, there will be files locked from download. Have you tried downloading just the single files you need?
It's possible it's not working. The devs have mentioned that they've been removing bugged commands, such as item durability modifier. You're probably not missing anything, it's just early access.
500 is a generic error. Just means something unexpected happened server-side and there's not anything specific to say. Nothing you guys can do to fix it from your end.
ServerCommunity lets you choose what playstyle your server will be filtered by in the server list, like "Roleplaying", "relaxed, "Hardcore", etc.
B can be Damaged - Whether players can receive damage.
Config Version and Blueprint Config Version are just version markers.