Hey @aljustiet, welcome to our Community.
Would you like to stop using the Dropbox application on your computer altogether?
If so, you'll first need to disable the backup feature, if you're using it.
Then, you'll need to unlink the computer from your Dropbox account, by clicking on the trash can next to it on this page.
After that, you're free to uninstall the Dropbox app and even safely delete your Dropbox folder, if you need to.
I hope this helps, but let me know if you have any questions.