My problem began after the last update, but I can't be sure the update was the cause sibce I don't use crop that much.

You can make thumbs without the crop tool, but it takes more steps.

Set up a new file preset of 199 x 199 px, 72 dpi.
After you save the original file, close it.
Open your new file preset.
Place your image file on the new file.
You can enlarge it using the corner handles, and move it over the file page however you want.
Then select File ->Save for web.
Adjust your file size (Quality) to less than 15 KB
Save to a location of your choice.
Ater you upload to Renderosity, you can delete it.

“Music is harmony, harmony is perfection, perfection is our dream, and our dream is heaven”
Henri Frederic Amiel