Lukas Zapletal writes: > When I move out data.fs from v2.5.1, install 2.6.0 and move data.fs back will everything ok? When all your (non core-)products are still working... > When I create application in 2.6.0 and then ditribute this binary to machines with 2.5.1 will everything be ok? Usually, I would not expect this. You may be lucky... Dieter