04/06/2020 10.15.4 Update
Updated to 10.15.4.
1. NOTE: ***DO NOT USE Clover r5109!!!*** That version caused my system to drop both Bluetooth and USB ports! r5108 works just fine.
2. Back up your system. I use Carbon Copy Cloner. This is SOP when doing updates.
3. Updated Clover Configurator.
4. Updated Clover to version 5108 (choose "Install anyway" if given the compatibility warning during that update).
5. Update, via Clover Configurator, Lilu, WhateverGreen, and AppleALC kexts.
6. Install the update. System will reboot two or three times (I lost count) and then you should be good to go. If Clover does not automatically choose the "Installer Preboot from Preboot", you must choose that on both reboots.
Update installed without any issues (aside from figuring out the r5109 problem).
Note on the r5109 issue: I had no idea it had a problem until the update finished and then got the login screen - but without keyboard or mouse. My usual mouse runs off the Fenvi Bluetooth, and my keyboard is USB. No USB ports worked and of course Bluetooth was out. I eventually fixed the issue by replacing both CLOVERX64.efi and BOOTX64.efi with the r5108 versions using Clover's Shell 64 utility. Note that the keyboard and mouse work fine at the Clover boot selection screen - just not after.
I am probably going to have to go to OpenCore after this version, but not sure yet - lots to learn there!