Next-Gen Gallery: Problem with uploading since upgrade

I have had the next-gen gallery installed and working fine. No problem uploading images.
Recently I upgraded to the latest version.. and since then I can’t upload images. It gets hung up on the thumbnail.
I get the following error:
Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 1204 bytes) in /home/admin/domains/alexoloughlin.org/public_html/wp-content/plugins/nextgen-gallery/lib/thumbnail.inc.php on line 923

I have my server set to allow very very large file sizes since on another site I load hi res images to a coppermine gallery.
Is there something in the thumbnail.inc.php that I should change?
When I open the file and try to go to “line 923” it says that the file doesn’t have that many lines. ??