I have it working. With the openocd that's installed by the 1.5 installer.
(edit: this sentence is wrong: But I had to copy the openocd/tcl files from the openocd version I had downloaded earlier, and tell the launch script where I placed it:)
I had to remove the path to openocd in settings.json: "cortex-debug.openocdPath": "<was pointing to the old install>"
