Hi there,
Thanks for the details.
I have checked your site and I am seeing the following Javascript errors on the console when I am on the rev slider admin area:
Uncaught TypeError: CodeMirror.fromTextArea is not a function
Uncaught TypeError: Cannot read property 'hasClass' of undefined
The version of your rev slider is the latest supported version of X so it could be that there is a third party plugin that is causing the JS error that is why you are not able to get the admin area working.
Kindly try to go to Revolution Slider > Global Settings then disable the options Include RevSlider libraries globally and Defer JavaScript Loading. Please make sure to purge the site’s cache after making changes on the settings.
Also, it seems that you have a standalone license for Rev Slider (ThemePunch) which you have registered. Please note that since you have Rev Slider validated, you should be able to get in touch the the Rev Slider support directly.
Hope this helps.