Sorry, I forgot to mention the file size is 764 KB. Limit is 1024KB. I'll keep working on it.
OK, this is a pain I know and although I don't use Avast Premier, but this is the first time I have seen this reported in the forums. Note Asyn is also using Avast Premier and presumably he isn't experiencing this issue.
Presumably this Firewall settings opens in a new window and not within or linked to the normal UI window ?
If so is there any way to actually reduce the size of the window, by dragging the top edge of the window down, but the cursor at the top edge and the cursor should change to a double arrow. sorry clutching at straws here not using Premier or the avast firewall and not seeing what you are experiencing.
The avastUI size and not just this has annoyed me for some considerable time, I think it is too big and many instances there are many blank areas. That and the total ability to resize it to suit the user, screen size, preference, etc.
As a side not what is the size of your screen ?
I have a win7 netbook that I had a lot of hassle with avastUI size wise as it only had a 10.1", 1024X600 pixel screen. That however is no longer in use and I don't have the latest avast version installed on it.
Ok... first of all, thanks to everyone for replying and troubleshooting this problem, I really appreciate it.

The settings window opens in a new window and not within the Avast window.
The first thing I did was to try to re-size this window. Yer right, the double arrows show on this window, except it won't change size. I tried to grab the top bar of the window and drag it up a little, but as soon as I let go, the window either jumps back to where it was, or the window opens full size, and when it's full size, the bottom is completely gone. The "OK" button disappears totally.
I am able to drag it around my screen, but not high enough to access the "OK" button.
I've got a 17" screen laptop, resolution is 1600 x 900.
I'm seeing that other long/wide screens come with a scroll bar attached to them, the Packet Rules box, next to the System Rules has both horizontal and vertical scroll bars. Other windows have vertical scrolls.
I recently just renewed my subscription, and changed a few settings. I just reset Avast to the default settings, so I'll try to send the screenshot again.

However, when I reset it to default settings, some setting didn't change back. Interesting.
Keep asking questions... there are many things I've already tried, but am not thinking to mention.
Thanks again!