Illustrator compatibility problem with EZCAD

Hi, 

I used Illustrator earlier this year, to produce simple black icons (SVG) [on laptop A] for then importing to EZCAD [on laptop B], for laser marking keyring with those icons. 

It all worked perfectly.

Then yesterday, a few months after the original batch of icons, I wanted to create one more icon. This time I opted for a trail version of Illustrator because my previous licence expired. 

But this time, the perfectly good looking SVG icon from Illustrator just appears like a random line squiggle in EZCAD. Note that EZCAD software has not changed, the only variable here is Illustrator. 

Has some recent Illustrator upgrade generated a compatbility issue? Are some features of the 'trial' verson of Illustrator restricted? Any ideas what could be causing this problem? Thanks.