What do you mean "Updates last 2 days each"?
Could Laurette means there are updated signatures every two days -- similar to the way an antivirus gets updated signatures almost every day? There's nothing wrong with getting updated signatures.
MalwareBytes itself shouldn't be coming out with a new version every two days though.
Where did you download your version of MalwareBytes?
We need to figure out whether you have the real thing or not.
And as Draclvr said, what is the exact text on the popups?