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The reason you're getting the message that no 2012 products can be found is because that is the case. You uninstalled your 2012 products, and that version of the VBA Enabler is specifically written for the 2012 AutoCAD products. For the 2013 family of AutoCAD products, you'll need the 2013 VBA Enabler, which you can download here:
Microsoft Visual Basic for Applications Module
http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id=12715668&linkID=9240618
Please mark this as a solution to your inquiry if it resolves the issue.