Thanks for getting back to me.
There shouldn't be any limit for the upload size of images, by default. Can you tell me where do you see the setting for 2KB limit? You can go to ~/Sitefinity/Content/Images/Albums
and there from the Actions
drop-down of your album select Edit Properties
and there you can set the size limit for Album and Image. Please refer to the attached screenshot for more details.
I hope this information helps. I will be glad to assist you further.
All the best,
the Telerik team