I can't download the mining software.
http://www.digibyte.co/content/get-your-first-digibytes.
You need a miner that will mine the correct DGB Algorithm for the DGB pool you are mining at. Normally you can find this info in your pools "Getting Started" page. Here are some examples:
Algorithm
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DGB Groestl https://dgb-groestl.theblocksfactory.com/gettingstarted
DGB Qubit https://dgb-qubit.theblocksfactory.com/gettingstarted
DGB Scrypt YOU NEED A SCRYPT ASIC MINING DEVICE
DGB sha256d YOU NEED A SHA256 ASIC MINING DEVICE
DGB Skein https://dgb-skein.theblocksfactory.com/gettingstarted
Here is the official bitcointalk thread: https://bitcointalksearch.org/topic/digibytedgb-core-v61651-digishield-digispeed-segwit-408268