Do I need to go back into Avast and restart the provider?
Yes, you will need to right click on the A ball in the tray, look for Start Provider in the menu. Then select Standard Shield.
Might that block AIM again even though it is loaded?
It might, so what we will do is run a simple repair utility within Avast.
Go to Start/Settings/Control Panel/Add-Remove.
Find Avast in the menu and highlight it.
Click on Remove and you should see the option to Repair.
Click on Repair. Avast will then scan its' files to see if any need fixing. It is not normal for Avast to interfere with AIM and other such programs, so something is "amiss" here.
We'll fix it.

Also, once you have the Standard Shield started, right click on the A ball and open up the OAP console. Find Standard Shield on the left and click on it to open its' interface.
Have it set to Normal. Go to the Blocker tab and make sure the box is checked to use the Default extension set.
I'm glad you decided to enter the forum. You can get help on most anti-virus stuff here as well as problems with Avast.
Lets see how you make out with this problem for now.
