Dxo pureraw no longer opons from capture one

Been using DXO pureraw for couple of months. looking forward to support for XT5, coming soon. But twice now DXO jsut stops opening from Capture One. Last time I spent a couple of hours trying to get the program to work, and eventually it did. not sure what I did to fix or if I did anything. now again, it is failing to open. DXO stuff looks to be great, but very unstable.