We are prepared to now accept uploads of previous proteins for credit after an update. However, we wish to discourage people from staying on a smaller protein because it is faster, if we switch from a small to a big protein for example. What if we only gave half-credit for the previous protein? But you could upload it until the next protein change? i.e. you could always upload the current protein, or the previous protein for half-credit. Anything older would still be refused. Only the current protein would be kept/ranked for energy/RMSD purposes of course.

I want your comments on this and if acceptable I can implement it for the next release.