Microsoft in their "opinion" fixed all the compatibility problems with IE 11, so they didn't need a compatibility button anymore. Thankfully they did leave another way to change the compatibility mode. First open the Heartland Forums website in IE 11. On the top right corner of the IE 11 browser is the a little gear looking button, called tools. Click on it and go to COMPATIBILITY VIEW SETTINGS. The Heartland Website address should already be in the add this website window. Click on the ADD button, then click on CLOSE. Heartland's website will now run in compatibility mode every time you open it in IE11. So far I haven't had any other issues with Heartland and IE 11.