If you switch from L3 Scholars OC to the L4 engine without paying the cost to upgrade, you will lose some resources. I paid for the minimal crossgrade but I did not upgrade, and therefore, I did not get the harmonies. *****There may be a misunderstanding somewhere, so this initial post is subject to change*******
See Bradley Grainger's response below.
"The harmonies, lectionaries, Biblical People etc. in Logos 4 are completely redone resources, and not just "ports" of the LDLS3 data files. A crossgrade [I think he technically means upgrade] to a LE collection is required to access them."
I have lost these resources by "upgrading" to L4.