fhutt wrote
What are the (k)eys and (c)erts?
Keys and certificates are used for cryptography. It allows you to connect to the Abyss console over HTTPS. It also holds some ACME information so that you can have your website(s) served over HTTPS.
fhutt wrote
I notice that the htdocs is in the Abbys installation folder, would this need to be copied into the new Abbys installation folder also maybe over writing the new installation contents?
Bingo. If all your web documents are there, then yes. Now if you changed the location for you web documents from htdocs to somewhere else, then htdocs isn't used. You need to copy whatever folder you changed your web root folder to. This is so you don't lose your HTML files and images you want to serve with Abyss. Hope that clarifies things :)