I had DDutil v 3 and SSDR v3 working together with my 6700 for some time. Basically I use it for one purpose - the autodrive power function when my Alpha 87a amp is on or off. All was well until a major Win10 update. Nothing worked including SSDR/CAT/DAX. I did a complete uninstall including hidden ports, then reinstalled. My 6700 worked fine after that but kept getting DDutil error with config file, so I did a complete unstall of DDutil including the files located in Users/Appdata both under DDutil and Roaming. So DDutil works fine and communicates and controls my 6700 but every 2nd or 3rd time I hit the SSDR Tune button or do it from the DDutil panel, DDutil closes abruptly. If I restart it it comes up with a config file error and I have to shut SSDR and restart. Then DDUtil works for a while and shuts down. There is nothing in itds errorlog.txt. Its not RFI because I can have the RF power down to 0 W and toggle Tune and it will happen. Weird. Any advice appreciated.