MKS Integrity - how to delete User session

We are still using the MKS Integrity 2009, Build 4.10.0.9665 version (Client + Web interfaces). I wanted to ask the community if they new how to delete the User history which gets stored against a User profile seperately for Web & Client.

Example I run a query on Web interface and close the browser. Then when I login back either same day or some other day, MKS runs last query I ran and shows me the result. How do I clear this user session.

One of our users tried running a very complex query and it timed out and now every time they try to open the Web MKS the page does not render.