To clear your cache in the popular browsers (Chrome, Firefox or Internet Explorer) on a computer, there's an easy shortcut.
(1) Shortcut to clear cache:
WINDOWS: Press Ctrl and Shift and Delete (not Backspace) at the same time
MAC: Press Command and Shift and Delete (not Backspace) at the same time
(2) This will pull up a dialog window to confirm. See the one corresponding to your browser:
Make sure these two checkboxes are selected, and the time range is the beginning of time. Then press Clear browsing data.
Make sure the Cache and Offline Website Data checkboxes are selected, and the time range is Everything. Then press Clear Now
We recommend you don't use Internet Explorer, but if you must, make sure these two checkboxes are selected and press Delete.
Now when you go to khmath.com, you'll need to login again and you'll get the latest files.