If you disable it on WP login form, you should also disable it for all WP forms. We'll check it for sure and update if we find some problem.

I had/have this problem as well. When I enabled Google recaptcha and created the keys, I could no longer log-in at www.sbms.club/wp-admin. When I did try iI received the following error message 'Google reCAPTCHA data are not submitted' 

With the help of my webhost, I was able to get in and remove the keys and disable Google recaptcha.

Any suggestions, before I try again?

We use reCAPTCHA on dozens of test and live websites. It does work and we've never faced with this issue. I recommend enable reCAPTCHA on all forms. This should work.

We'll re-check and optimize reCAPTCHA in next version to avoid such cases.

How do you do this if you are unable to login to the admin area without deleting the plugin and starting over?