Dreamweaver 2017 search replace + select field choose sites

1.) When I search and replace then button "replace" sometimes is not clickable

Unfortunately, I could not figure out exactly when this happened.

2.) When I search and replace and I click on the "replace" button, then the text is replaced but the selection not go to the next position, so that when I click more than 1 times on the replace button then I replace always the same text at the same position. That's a catastrophe!

3.) When I choose a site in the select field of my sites, with the old DW version, I can step by my very many sites with the keyboard keys. Example I can click on the "m" key so I can step all sites that begin with "m". With the new version, this is not possible. When I click more than 1 time to the "m" key, the selection remain on the first site with "m".

I think the old GUI was better 😞