Download the latest Bitcoin Cash compatible release of BCH Unlimited (1.8.0, April 17th, 2020) from:

https://www.bitcoinunlimited.info/download

https://github.com/BitcoinUnlimited/BitcoinUnlimited/releases/tag/BCHunlimited1.8.0.0

This is a major release of BCH Unlimited compatible with the upcoming protocol upgrade of the Bitcoin Cash network. You could find May 15th, 2020 upgrade specifications here:

• https://gitlab.com/bitcoin-cash-node/bchn-sw/bitcoincash-upgrade-specifications/-/blob/master/spec/2020-05-15-upgrade.md

This is list of the main changes that have been merged in this release:

• Project rebrand to BCH Unlimited
• Increase length of unconfirmed transaction to 500
• Drastically improve performance of mempool management
• OP_REVERSEBYTES implementation
• SigChecks implementation
• Failure recovery for Graphene
• Graphene improve block construction reliability
• Improve QA tests (both units and functional tests)
• Reduce resource requirement for Parallel Validation
• Fix datadir compatibility problem due to unspecified ABC parking/unparking chain concept
• Clean up and update the seeders list
• Various improvements to deadlock detectors
• Misc improvements to IBD
• Use ctor to improve fetching tx from disc (txindex=1)
• Add a priority queue for urgent message processing
• Documentation update and improvements
• Improve ElectrsCash integration
• Rewrite of the fee estimator

Release notes:

https://github.com/BitcoinUnlimited/BitcoinUnlimited/blob/dev/doc/release-notes/release-notes-1.8.0.md

PS Ubuntu PPA repository is currently being updated to serve for 1.8.0.

edit: there is no support for the proposed IFP tax in this release.