Premiere CC presets missing and Can't Open Sequence error

Question

I'm having a couple problems with Premiere.
I was working on a project that's been just fine for a while, but now when I try to open it, Premiere gives the error:
"This project contained a sequence that could not be opened. No sequence preview preset file or codec could be associated with this sequence type."
Also, in any project when I'm creating a new sequence, there are no useful presets. I found the sequence presets folder, and they're all in there, but they don't show up from within Premiere.
Also, when I import AVCHD .MTS files, I get video but no audio, even though they play ok in VLC
Solutions I have tried but which do not solve anything:
1. Sign out, restart Premiere, sign back in
2. Recreate the Adobe Premiere Pro preferences and plug-in cache. (using shift/option combo)
3. uninstall premiere, reboot, run cleaner script, reboot, reinstall premiere
4. uninstall premiere, reboot, run cleaner script, reboot, create new user account, install premiere in that user account instead of original account
I am aware of this page: http://helpx.adobe.com/premiere-pro/kb/features-presets-missing-premiere-pro.html
and this page: http://helpx.adobe.com/creative-suite/kb/cs5-cleaner-tool-installation-problems.html
Some pages I've come across have suggested running the cleaner script multiple times, but you can really only run it once, because after the first cleaning, when you run it again nothing shows up on the list to be cleaned.  Are there still remnants of Adobe stuff left on my machine uncleaned by the cleaner script that I need to delete manually?
Has anyone else had this problem but not had any of the adobe-suggested solutions work for them and eventually fixed this?
This is Adobe Premiere CC 2014.  I'm running it on a Mac Book Pro that's less than a year old, running OSX 10.9.5 w/ 16GB of memory.
This is INCREDIBLY FRUSTRATING.  I've spent most of the day troubleshooting this issue and all I want to do is edit my video. A cursory search of the internet shows that I am far from alone in having this problem. Also, reinstalling is not trivial because the download speeds where I am are slow.
dave

Answer 1

Well, it took a long time, but I eventually got it working properly.  All of the presets and codecs show up, I can import AVCHD files properly with audio, and the project I couldn't open before now opens fine, so it turned out not to be a corrupt project. It looks like the problem was that the cleaner script didn't actually clean everything it should have, and I had to do it all manually.
I uninstalled all of the Adobe Creative Cloud software, rebooted, ran the CC Cleanup script, and rebooted again.
Then I uninstalled Flash and ALL other Adobe software I had on my machine.
Then I used the Find Any File app to find every reference on my Mac to any file with "adobe" in the name--including system files--and deleted them and emptied the trash.
The only Adobe things I left on my machine were the Adobe RGB color profile and any Adobe fonts I had.
Empty the trash again, reboot again.
Then I used the CC installer to install Premiere and only Premiere (I didn't even install Adobe Media Encoder) because I didn't want to go through all that download time only to have it fail on me again.
And at long last it worked. Then I went back and installed Media Encoder, which didn't seem to break anything, so I went back and installed the other CC software I wanted on my machine, and things are working at last.
The "cleaner" script leaves a LOT of Creative Cloud-related files on your machine, which, in my opinion, means it's not a very effective "cleaner."  It seems to want to leave a lot of preference files and other files whose purpose I don't know (but I deleted them anyway).  There should at least be a checkbox somewhere on the cleaner that says "wipe absolutely everything related to Adobe off of my machine".
Thanks again for your suggestions, Neil.
dave