OK folks - if you want to be on the safe side, wait for the official v1.15 release. Will be out by tomorrow.
If you are or were the impatient type, run GSC Sync - it should give you 2.6GB worth of files to update relative to v1.10 - v1.15 is actually only 862MB in new / modified files, but it seems like the checksum in some files got modified for reasons we´re still investigating.
If you ran a 800MB or so update earlier on and seem to have v1.15 running OK, run the Sync again in any case to correct all the wrong checksum files.
EDIT - GSC Sync still under PW, will be lifted within the next hour.