Nothing is working on my site

Before upgrading your WordPress to 3.7 you have been warned and advised to backup the database and your files at least twice. Have you done it? If yes, restore your database and files from the backup. Also, I can assure your Customizr. 3.0.13 works very well with 3.7.

My advice is to setup a test domain or subdomain and try this: install a WP 3.7 clean. Install Customizr 3.0.13 clean. Export your posts from you current website and import them into the new one. Install and activate your plugins. If all is well on the test site, I’ll teach you how to swap it on the website. If it’s not ok, my solution is not good.

Man with customizr u don’t need mootools, easy gallery o lightbox and there is on your web site a lot of scrab if you read about customizr and study a little u can see that there is all functionality of that plug ins u use there i’m sure you have conflict with some scripts ‘cose they use same classes like cusotmizr. or u load jQuery many times you must cancel all that things they make your web site slow not competitive… use only customizr & ultimate shortcodes
install t3cache and nothing else you load more than 11 *.css and around 10 .js scripts so uninstall all that install default word press theme delete customizr and after that start with 3t total cache, install wp3.7 and customizr … must work all perfect use all what costumizr give you

@acub I did backup the database and files and did a restore. However it did not fix the problem.

So you guys are basically telling me to start from scratch which is not what I wanted to do. However, I will try your suggestions and let you know if they work. Thank you

Not really. The concept of backing up implies not starting from scratch.
If you backed up your database before upgrading WP, here’s what you need to do:
1. Download the WP version you had before upgrading from here.
2. Install it clean.
3. Import the database backup into the clean install either using WP importer or by using phpMyAdmin (if you backed up using WP exporter, you need to import the database with WP import). If you backed up using phpMyAdmin, Adminer or similar products, you need to use the same tool to import.

At this point your site should be restored. Installing clean and importing database is the only way to downgrade WP, because sometimes WP changes the database structure and you can’t run lower version on a database updated for higher versions. This is why your restore doesn’t work, because your database has been upgraded for 3.7. You need to reinstall 3.5 clean (or what you had before) and than import the backup data.

And by the way, this has nothing to do with Customizr, you would have had the same problem no matter what theme you were using. If there was such an issue with Customizr, you wouldn’t have been the only one experiencing it.