Downloading extensions (STL) from warehouse

I get an error when downloading the slt extension so we can print on makerbot

Hello and welcome to the forums tfeimer! In order to determine what is causing your error there are a few things we can try. Before we get started, it would be helpful if you could share some additional information with us. What sort of an error are you getting and when are you getting it?

The extensions from the warehouse say there is something wrong with the sign in

Okay, based on the info I have here and what you are telling me, it sounds like the problem might be with one of your cookies. Your profile says you are using a windows OS, if that is the case, you need to go in to Internet Explorer and clear your cookies and your cache. Can you do this and tell me if you are still getting the error?