From: Pittsburgh, PA
It occurs to me that how I described how to add code now likely wasn't helpful enough since you said you're not techy and I'm realizing my reply was still probably too techy. Let's see if this helps.
Click "my profile"
Click "my art"
Go to the piece you want to edit and click "edit"
On this page, you'll see the title, media, and your description. Click anywhere on your description to bring up the editor
If you did the above step successfully, you'll see a bunk of little icons above your text. You want to hover over those icons and click "view html source"
This is what puts you in html mode. Here is where you add your code from PayPal (or remove it if you're cleaning up an outdated button"
When you're done adding your button code, click that "view html source" icon again to go back to normal view
To save, simply click the page anywhere BUT the section where you were just working on your artist statement. This closes the editor.
Does that make more sense?
Get out of the vacuum and express yourself!