problem recalling mix between 2 systems

Cubase
1

I carry my main project SSD whilst mixing between 2 systems in different locations. Until now this has not been a problem. Seems since 9.5.10 : some settings are not remembered on some plug ins. Reaktor 6 and SPL drumxchanger do not load correctly as though they cannot see the source library. The Neve 6144 DDMF eq plug in does not remember settings - used extensively on this particular mix. Anyone with similar experience or any suggestions.
With thanks,
Mark

2

Could it be that you have vst2 in the one project but are loading vst3 instead in the other (or vice versa)??

3

Thanks Grim - I will check that.