Drag and drop not working on 3.5

I updated my site to 3.5 and then updated the Sweet Capture to 2.4.3.6. Everything was fine for a week, but now will not drag and drop and users are unable to login. Find it strange that it worked for a while before crashing. Any ideas? I think this is a very cool plugin and appreciate the work done.

https://www.ads-software.com/extend/plugins/sweetcaptcha-revolutionary-free-captcha-service/