i think this is just a counter act on the hacked rigol fw thread, they probaly only correct Pluses in one place and thats it, and then encrypt it so no more low level hack. they dont even bother or dont know how to use "Find word" feature to correct all the Pluses, i guess they are on Win7 or later (Find file with keyword function in WinExplorer is real sucks). Possibly they also blocked hacked version from being installed in this version. If there is no substantial improvement, i will say there is no need to upgrade to this official version, we may keep an eye on the hacked fw thread. ymmv.