Two Seperate Companies - How To Use Free Zoho?

Two Seperate Companies - How To Use Free Zoho?

I have two companies that I run and operate.
I run them from my same laptop and would like to have two seperate instances of the application running for the two companies.
At the moment as I attempt to login with the 2nd companies details, it auto-recognises me and auto-logs me into the 1st company, of which I already have a session open for.
How do I get around that?
Please help

Thanx
Alastair