I have emailed autel support as this is the main reason I bought my ms906 and still no response. That is not the only options missing. Still no reply

 Not unless you are very computer knowledgeable and copied your Maxi Sys scan folder scan folder to a SD card you saved and somehow able to delete the newer Chrysler update, then copy extract and paste the older Chrysler update files back to the Maxi Sys Scan Folder. Autel has never given clear instructions on how to back up Maxi Sys Software in order to be able to roll back to use an older version or how to retain an older version of software next to a newest version on your tablet.

 yea other thing like the "set rpm xxxx" don't work on early chyrsler....although they had most things fixed in 7.01, but messed it up with a "upgrade".......

 the way I used to keep multiple software updates versions in my tool was by renaming the folder to something else. example the current Chrysler software will just leave it as is so that it keeps updating and an older one will rename to chrysler2 or you can even rename it with the software version number, since it has a different name it will not get updated. first you need to have a back up or multiples ones  even, then rename them and write either the released date or version number, just an idea.

 Does anyone have a Dodge file that has not been updated to the new 7.51 version they could email me??

 Let's hope this is simply a version issue and not the work of a 'higher power'