Just open a support ticket and we'll do our best to help you.
Follow this link to the support site and create a ticket.

No. You just need your everyday browser to use our on-line software. Javascript must be enabled in your browser.

Any modern browser should work: Firefox, Chrome, Opera or Internet Explorer.

Text based browser are not supported, sorry Lynx.

Create a support ticket.

Let us know also which type of calculation you were doing, when and any error that appear on screen.

We'll try to track it down and restore your lost points. This is possible in almost the 99% of the cases.