Yes, you can use the MAX25206EVKIT for a 60V input and 5V/2A output; however, the EVKIT is not designed for these operating conditions. Hence, you will observe some components on the board getting very hot and the efficiency is lower than expected. If you plan on designing a MAX25206 circuit with a 60V input and 5V/2A output (or similar), please use a lower switching frequency of around 250-300kHz, unlike the MAX25206EVKIT which is set at 2.2MHz fsw. Please use the EE-SIM design tool to generate a correct circuit for MAX25206 easily. The EE-SIM tool will also give warnings for possible heat dissipation in MOSFETs for a given design which can then be avoided by lowering the fsw or accounted for by proper heat sinking etc.