Palestra,

Unfortunately, Incredimail tends to "hook" Outlook Express, so you need to do a number of things to get it completely removed. Here are a couple of links on how to do that:

Incredimail Uninstall

After that check the steps in this Microsoft article:

OLEXP: "Cannot Find Incredimail.exe" Error Message When You Open Attachment After Removing Incredimail
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In regards to Weatherbug, this should help. First, start by going to the Control Panel/Add-Remove Programs and uninstalling it from there. Then follow the links below and you should be able to get the remnants:

Uninstall WeatherBug

How do i uninstall ''Weatherbug''?

Hope this helps.

Grif