At least everyone has some time to cool down and think and absorb all the information that came out in the last few days.

Wait, you voted the wrong way! Here, take a few days to think about it, and then let's try again, ok?

Unlikely. The leading candidate is already being investigated by the police.

Chances are he’ll be jailed or otherwise prevented from running.

I did not mean to imply that the population should vote again for the same candidate to demonstrate their independence. New evidence was presented to and by a high court and it's fair to expect it to be considered (for example for how convincing it is, and for what all the candidates have to say about it, and even for who presented it and for what reason).

If the evidence was serious it also would not make sense to let the election continue.

Finally I don't know about Romania, but in a few other countries in Europe, no matter what happens to that sullied candidate, these votes are not too likely to shift to the incumbent party. See for example the circumstances that enabled Macron to be elected the first time in France.