The "Snap to" drop menu is off always.

I installed the Corel 2018 last week and had been working fine on it, until today, when the "Snap to" menu got off and I can't snap to anything. No idea what happened. I tryed restoring the software (F8) and then it was working again. Then, imported my saved workspace, and got off inmediatly! Hope anyone could help me.

Oswaldo.