Premiere CC 2017 suddenly won't import MTS files NO SUGGESTED SOLUTIONS WORK

I'm desperate for help here, I'm working on a Mac Book Pro. I was having no problems importing MTS files before today, but was unable to get any audio. So I searched the forums for a solution and tinkered around with renaming my Adobe folders and I think that screwed something up. Now I can't import any MTS files at all, it says the MTS files have an unsupported compression type. I repeat, NO SUGGESTED SOLUTIONS HAVE WORKED. I've tried moving the AVCHD folder onto my hard drive/desktop; I've tried renaming the Media Cache files, nothing has worked. It seems like the more I try the worse it gets and the less my MacBook wants to even communicate with me. I've been combing through the forums for hours trying to fix it. Please help. I should mention also that I've only been using a Mac for about two weeks now and a lot of the forums' language is foreign to me. If someone could provide me with a step-by-step solution that would be great. My job literally hinges on this. Thanks.