CKL USB 3.0 HDMI KVM Switch Dual Monitor

SECOND UPDATE: So, about half a year ago, I noticed strange lines forming on my second monitor in the setup I use in this KVM switch. I've isolated it to the KVM switch itself. I've replaced countless cables (including their proprietary "A" cable), a docking station, and even the monitor itself, and it's ABSOLUTELY the KVM switch causing the lines on the second monitor ONLY when using computer input #2. In addition, the keystroke toggle between computer inputs no longer works either. I find this EXTREMELY frustrating as I (and anyone else) would expect the product would last CONSIDERABLY LONGER. *** UPDATE: It took a bit of digging to get a solid support contact at CKL, but once I did, they reassured me that my warranty was for a year and they guided me through troubleshooting over email until the problem was resolved. Turns out, one of my USB connections (the one to my desktop machine) wasn't completely connected. Anyway, definitely ended up doing a fine job on support. *** Let me start by saying that I really liked how this KVM worked. I bought it in February 2020 and since then, it worked pretty well. The return window closed in March and then the support window closed in August. Now, in October/November, all of the sudden, the USB unifying receiver on my Logitech MK545 Wireless Keyboard and Mouse just stopped being recognized by the desktop computer connected to the first channel of the switch. That's right, the receiver/keyboard/mouse works when I switch to the second channel (my laptop), but when I switch back to the first channel, I have to unplug the receiver and plug it into my desktop to get the keyboard/mouse to work - negating the whole use of the switch altogether. The same thing happens when I try to connect the receiver to the front of the switch as well. Dropping $107.17 on a switch only to have it break within a year is UNACCEPTABLE and I really hope something can be done to fix/replace/exchange my switch. I can't even contact the seller. This sucks.