Alt Text and URL HELP!

Hi!
I’m using NextGEN Galley for over 2 years now. The only thing that bothered me is that it changes the image URL every time I edit the image Alt Text and also, you couldn’t leave the alttext box empty since it always showed that “ugly” picture_name_something title above the image in the Imagebrowser view. So, I did some minor “tweaking”, actually just removing the line:
$image->image_slug = nggdb::get_unique_slug( sanitize_title( $image->alttext ), 'image', $image->pid );
from ” // only uptade this field if someone change the alttext” section in manage.php file. I’ve updated it regularly up until v1.9.13 but since the v2.0.0 the complete code was changed and I couldn’t figure out how to make it work like the old one. When I update the NextGEN Gallery from v1.9.13 to v2.0.0 it regenerates all the URL’s, recreates all Alt Texts and creates a mess on my website.
The thing is, I need to make NextGEN Gallery behave like this: When I create a new gallery and upload images, it creates all the image slugs, generates Alt Texts (the “ugly” ones with dashes) and everything as it should. After that, I want to be able to delete the alttext and leave it empty (so when I view the image in the Imagebrowser view it will show no text above the image) and also, when I edit or delete the Alt Text, I want the image-slug (thus the URL of the image) to be unchanged (the same as it was created in the first place)
I know I almost wrote a novel here and I’m sorry about that. I was just trying to explain myself as much as possible.
Any help/ideas?
I’m pretty stuck here and I just can’t find the way to solve this. I’ve got my fingers crossed that the community will be able to help.
Thank you all in advance!

https://wordpress.org/plugins/nextgen-gallery/