Easel opens, closes, opens, closes

Periodically when I open easel it opens to the “start a new project” page then goes to blue screen then opens then blue screens etc, etc. I have a four year old mac book. This happens in Firefox and Safari browsers. In the Chrome browser I don’t get the 3D portion of the screen.
Fixing it is a problem that I haven’t solved, some times it’s just clears up, others I have to close everything and force the computer to shut down.

Does anyone else have this problem?