ru serious? Do my site over again?
the site is working so you do not need to redo the whole site - make a backup of the data base and any assets - images, static pages and the like
then you could do one of these - ( I went through a similar problem awhile back - I did the first method)
A - 1. you've made a backup of all that content right?
2. completely remove any extras you use - uninstall, remove and then reinstall You can do this one at a time (though if you are using Articles I would remove all of the extras it installs and reinstall it - note I think I read somewhere here they may be a problem with the latest Quip, might be fixed by now) or just do all of them and reinstall.
B - if A doesn't work or you just want to make sure it works:
1. - you've got that backup of content... all of it...
2. - delete the whole install and drop all your db tables
3. - Install from scratch and make sure the manager works
4. - install all the extras you use. check again that the manager works
5. - restore all your files and restore the database tables ( I have just dropped all the new tables and restored from my back up)
Hopefully now it all works -
Either method doesn't take all that long to do - in fact Method B is might be faster!