Hi Marijn 
Click 
Settings - Networks - Add Network
Network Name: Smart Chain
New RPC URL: https://bsc-dataseed.binance.org/
ChainID: 56
Symbol: BNB
Block Explorer URL: https://bscscan.com
Click SAVE
Next step 
Click Add token - select Custom Token and add Token Contract Address:
0x2170ed0880ac9a755fd29b2688956bd959f933f8
