You can find the full changelog for the latest release quoted below. Do note that the developer fee is ~0.85% for both normal mode and algorithm switching mode as SRBMiner is a closed source miner available for AMD GPU miners only under Windows.
SRBMiner V1.8.4 Full Cangelog:
– Performance increase for Vega56/64/Fe/Vii up to 15%!
– Minimum for ‘main_pool_reconnect’ is now 60 seconds instead of 180
– Added new cmd parameters: –disabletweaking, –cgputweakprofile
– Added new config parameter: tweak_profile
– Minor bug fixes