MSMTool clear userdata.
When updating to 7.5 I have already had to do it and I lost 2 days between backups and restore.
Now to update to 7.6 same proceed ?. I prefer to stay at DeepFerst. I know that with MSMTools I can start from 11.0.2 note necesary from 10.0, but ... it is inadmissible lost all system/data on every update and have to delete EVERYTHING to recover it.
In my case, I have a lot of GB of data in the SD that just making a backup takes me one day. And put it back, apart from the apps (500) and their data, ... for me , inadmissible . A shame because I love CRDroid and they have done a great job with the rom but the update system is totally unstable.