We just added a New BEAM miner in BetterHash. The new miner uses the BeamHash III algorithm, and mining is possible using NVidia and AMD GPUs.
According to BEAM developers: "BeamHash III is the final PoW algorithm for Beam. It is an upgrade from BeamHash I and BeamHash II and the vanilla Equihash on which the original was based. The goal is to create a proof-of-work algo that can see Beam to a successful future, focusing on stability, GPU mining community, and users.".
The BEAM miner is up for a manual update. Download the latest version of BetterHash, go to Settings/Miners and click the Re-download all miners link.