To just keep everything as is you would need the following from the old website people:
* The FTP credentials to upload the files. * The webhosting account login to renew the hosting fee (probably monthly or yearly). * The domain name account login (can be the same as webhosting, but not always) to renew the domain name fee (usually yearly).
Dreamweaver is an out of date program used to edit the (HTML) web page files. It's known as a WYSIWYG (what you see is what you get) editor where you update the web pages as they look (or an approxmiation of what they look like). You could connect to the website via FTP and download the files to any computer and then edit them with Dreamweaver or learn some basic HTML and edit the HTML files using any text editor (such as notepad).
Like many have said you may better off rebuilding the website in a modern WYSIWYG tool. The website is dated but very simple - copying and pasting the content into a software as a service website provider (WIX, SquareSpace, Weebly) which shouldn't take much time and they are easy to use (drag and drop, WYSIWYG). Then you can login to your domain name account and re-point the DNS to the new website and then cancel the old webhosting and not worry about it anymore.
Total Party Kill (iOS) https://apps.apple.com/us/app/total-party-kill/id1462538547
Heart Star (iOS) https://apps.apple.com/us/app/heart-star/id1159003700
Total Party Kill (Android) https://play.google.com/store/apps/details?id=com.adventurei...
Heart Star (Android) https://play.google.com/store/apps/details?id=com.adventurei...
The rest of the cost was in the monthly payments.
It really makes me think Nintendo has an untapped market here to sell a little box you plug into your PC that plays switch games, interfaces with their controllers, etc. They've done oddball stuff like the SNES Gameboy player and GameCube GBA player add-ons in the past. It feels like there would be people willing to pay to properly play Switch games on their gaming PCs.