Hey all, I installed the older enb 0.275 files replacing the existing enb files from NVE which stopped my game crashing on boot.
The normal way of starting lspdfr through launching rage works for me.
I found those 2 files (you only need d3d11.dll and d3dcompiler_46e.dll) from this old enb upload here:
GTA 5 ENB Series v0.275 with Realistic Graphics Config Mod - GTAinside.com
I'm on the latest everything including october 2020 NVE release, latest lspdfr and latest rage, and everything seems okay after the older enb is used.
I also increased my plugin timeout threshold to 60,000 in rage settings, not sure if this helped.
Credit to Joey Beckstead in this thread for finding the fix