I'm coming back from the same thing. I'm going to repeat my last cycle since I am getting close to my true 1RM on all my main lifts. I think pushing forward with the weights would just lead to frustration and a delay in getting back to productive lifting. When in doubt go a little lighter than you normally would.
I've been using 531 for over a year now, and I've been steadliy progressing. I've used that same thought process every time I come back from a time where I'm sick/ can't lift.