Fatal Error with Ocean Extra

I’ve recently started getting the following overriding error message on our site if Ocean Extra 1.5.0 is enabled.

“Fatal error: Using $this when not in object context in {snip}wp-content/plugins/ocean-extra/ocean-extra.php on line 480”

Any suggestions how to fix this? Odd how it’s started now since the plug-in hasn’t updated since Dec 1…

Thanks for any help!