K1000716:kiwitrc: figured out why l could only remove two at a time, I was selecting an installed app which made the remove box vanish. trap for noobs :-):-)
No, the real noob trap is trying to long press on apps to add them to your selection. ;)
Yours truly had given up and tried nearly everything (not kidding here) before realising that one...
Now I just wish the web version would let me delete old devices.
I added a quick how to in the original post for other noobs like you and me.