I updated my KIS from 1.1.5 to 1.2.2 and noticed the Attach key has been changed to H. I tried attaching a Flexotube to an MKS base module like I've always done, and it highlights red and when I try to click to attach I see "target object is not allowed !". How can I get this behavior back? This is the most standard way to connect base modules together. It definitely needs to work! Here's an attached screenshot showing a base built with many of these attachments, with a failed attachment on the far left.

Ahh crap it looks like somehow my screwdriver got un-equipped. Not sure how that happened. At any rate, perhaps a better error message to help me notice this is the real problem?