Your links will stop working if you uninstall the plugin.
I’m trying to find a way to remove the plugin safely myself. Did you find a way of doing it without breaking existing links?
Yes, I know. I asked the developer who told me to delete the records and this will help with site speed (that’s why I wanted to delete it). I followed his advice but my site was still slow so I had no choice but redo all the freaking links one by one. It took me like 2 days but I did it thanks God and I got rid of pretty link. After that my website went to under 2 sec loading time. Before deleting the pretty link plugin the site speed was almost 6 sec! Anyway I hope you’ll find a better way because what I did was a pain. Good luck!