As a general rule, it is considered a lot more secure to compile a software yourself, rather than download the already compiled binaries from the internet.

Follow the instructions to compile the full Bitcoin ABC wallet, which you can use to spend your BCash:

• Grab the source code.
• Compile it. You can follow this guide.
• Start the daemon: bitcoind -daemon -disablesafemode
• Import your now-empty wallet seed using the command bitcoin-cli importprivkey <privkey>. To get the WIF from your extended seed, use bip32 or airbitz. You have to import all of them!
• Wait for the blockchain to sync (might take a day). You will run into issues with peering. Just restart from time to time. Eventually it will sync up
• Use bitcoin-cli sendtoaddress to send your bitcoins to the exchange