HELP!!!

I'm in the very beginning stages of updating my theme to Kalium . It is a portfolio site that has to be posted by Monday. (Taken out of maintenance mode...)

> Next to the radio button for "Main/Background Image" There is NO button with a CTA of "Change Image" (Option does not exist.)

I have all the latest versions of theme, plugins and WordPress. I have went through all the troubleshooting steps twice, including switching to Twenty Fifteen to test with ALL the plug-ins except Slider Revolution OFF. 

STILL DOES NOT WORK on both the child theme and Kalium.

After researching, this issue has been reported many times... so there must be a solution??

I'm not a Programmer- so need some help with this ASAP...

Many thanks, Donna

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