First try clearing the cache in the dashboard under sitewide settings and see if the 'Popup menu' works because it says this add-on is compatible with Concrete 5.5.

You'll probably want to use the support page for each add-on-

1. Simple Blog- developed by ChadStrat

Chad says-

"***** THIS PRODUCT IS NOW DEPRECATED. PLEASE SEE COMPOSER BLOG OR PROBLOG. IF YOU'RE AN EXISTING CUSTOMER OF SIMPLEBLOG, PLEASE CONTACT ME FOR YOUR FREE UPGRADE TO COMPOSER BLOG******"

Contact him herehttp://www.concrete5.org/profile/-/7790/...

or use the support function- on the right of the page (5th one down)
http://www.concrete5.org/marketplace/addons/simple-blog/...



2. Pop Menu- developed by jb1

Use the 'Support' button on the right of the page (5th one down)
http://www.concrete5.org/marketplace/addons/pop-menu/...


3. Advanced Comments- developed by 12345j

Use the 'Support' button on the right of the page (5th one down)
http://www.concrete5.org/marketplace/addons/advanced-comments/...