The STK61 has limited onboard memory. After setting your lighting in the software, you must click the "Apply to Device" (or "Sync") button at the bottom. Then, hold Fn + Backspace for 5 seconds to save the profile to the internal flash.

The honest review: It is .

Usually, no. The STK61 uses a proprietary chip (often the BEKEN BK3632), which is not compatible with QMK. You are locked into the manufacturer's software. However, if your specific STK61 has a "Nordic" or "ATmega32U4" chip (check the PCB), you might flash it. But for 99% of users, the stock STK61 keyboard software is your only option.

The STK61 keyboard software provides several benefits to users:

To further enhance the STK61 keyboard software, the following suggestions are proposed:

The STK61 software is primarily used to personalize the device beyond the factory preset shortcuts. Key features include: