First, you just can't expect we would be available to reply 24/7, when you post something in the middle of the night. Not everybody lives in the same time zone, it's 7:34 AM while I'm writing this...
In any case, there's no "problem on our end", since nothing regarding the detection of a debugger has changed in Couatl.exe since it was released years ago.
The problem is surely been caused by something else have installed, most likely an antivirus, fact that there are several of you reporting this at the same time, might indicate an antivirus live update has changed something, making the antivirus more invasive than ever, attaching as a debugger to every .exe that runs.
And no, you will not see this on the Task Manager, it's probably a service or something that you always run in the background that has been updated in some way. It's not necessarily have to be an antivirus, even if that is the most likely case but, for example, we had issues with the ATI Tray Tools, a program so invasive, that silently attach itself to each and every .exe running on your system.
So please, before being so sure saying the problem is on our end, let's discuss what you have installed, if it was updated recently.
Fact the antivirus doesn't report problems, doesn't mean much: if it's attaching to the exe as a debugger to *check* this, it would trigger a reaction from couatl.exe regardless of the outcome of the scanning.
We never had any problem with debuggers before but, of course, before taking any action, we should first identify WHICH product is causing this.