Neo4j 4.0 Upgrade Discussion (Desktop)

Hi there,
after hours of working with Desktop 1.2.4, Neo4j 4.0.0 yesterday (thousands of node & rels) and shut down normally,
immagine
today I get the same dreaded password failed error as reported by paulj. database.db always unavailable; on opening, always "Password has been changed", and always "Failed - not a valid password". Have I lost the db? I've tried passord revovery:

C:\neo4j\neo4jDatabases\database-bbb4a47e-b1a4-47a8-bc7f-bcbb72b1e715\installation-4.0.0\bin>cypher-shell -d system
There is no procedure with the name `dbms.showCurrentUser` registered for this database instance. Please ensure you've spelled the procedure name correctly and that the procedure is properly deployed.

I cannot even dump the db:

C:\neo4j\neo4jDatabases\database-bbb4a47e-b1a4-47a8-bc7f-bcbb72b1e715\installation-4.0.0\import>../bin/neo4j-admin.bat dump --database=graph.db --to=./calc-12-feb-2020.10.31.neo4j
Active logical log detected, this might be a source of inconsistencies.
Please recover database before running the dump.
To perform recovery please start database and perform clean shutdown.

But I cannot start.
BTW, I had got version 4.0.0 finally working only by creating a new db and loading a 3.5.14 dump; never succeeded in simply upgrading from 3.5.14.
But now my db seems dead? what else can I do?
With so much unexpected frustration, how can I recommend this nice Neo4j to less experienced developers?