Unlike high-end dongles (OBDLink MX+, etc.), the There’s no “Check for Update” button in the generic OBDPeak app (which is mostly a rebranded ELM327 interface).
Have you encountered a specific error code while updating your Obdpeak K2? Let us know in the comments below, and we’ll try to help you troubleshoot it. obdpeak k2 firmware update