To use Pathfinder, you need to use Chrome as your internet browser. Pathfinder is not compatible with other browsers (e.g. Internet Explorer, Safari) because they can work differently from Chrome and may cause unexpected behaviour when using Pathfinder.
Downloading Chrome only takes a few minutes:
Click this link to Download Chrome (it will go to an external site from Optimo)
On the Download Chrome page, follow the prompts to install Chrome, it will only take a few minutes.