One little setback, my harddisk is crashed after 2 1/2 years. Seems to be seagate rules... Think my new hsdg 7k6000 will live longer.
The good news, no essential code is lost, had only recompile openvdb and now i must include it and one or two others for the use in the plugin. openvdb will now be v4_0_0. I think i need 3 or 4 days to make it run again.