Hi, the large EBMC button on the launcher screen will automatically load any version of EBMC you have installed, please make sure you have 1 installed, if you have Kodi or SPMC installed these wont load from the EBMC launcher button.

If you have EBMC installed & its still not working you may need to run a firmware update to get the shortcut button working as its the only way to edit the large shortcut buttons on the launcher screen.