This isn't working, perhaps because I need to be more specific. I already have a drawn (real) signature from PC1 (Windows 8.1 & Acrobat Reader DC), and have created an Acrobat Cloud account, hoping that all other PC's that I open the Cloud into, will "save" that signature. It doesn't.
My specific example, is PC2, where I'm using Windows 7 & Acrobat Reader XI. Here, when I open Acrobat XI (and login), my "Tools" menu only shows "Export, Create, Send, Store" options. The "Sign" option is at the Top along with "Tools, Comment, and Extended".
When I click Sign, it only gives me options to create a BRAND NEW signature, with no visible options to "Enter Profile details" as you've described. There are no options to Save anything, because it doesn't have a signature to save.
To recap: I already have a signature that I want to keep using; how do I get the Cloud to "pick it up"?