Excuse me for being stupid but,.....when trying to upload I get an error message that states I have to create a category first when adding a picture. Clicking on this heading shows only one option, 'select category.' How am I supposed to navigate this??

Hi,

you should be able to go to Profile on the horizontal menu options then forum profile.  here you should see the option for your avatar picture.  this will allow you to browse your local computer for the picture you wish to use.  if the dot is in the option "Upload an Avatar" to the right of the browse button.

hope this all makes sense, if not just shout