Difficult to select flexi prims

What am I doing wrong here? One day I can select and edit flexi prims no problem at all and the next I JUST CANNOT select them! No amount of clicking around the prims selects them! It's taking ages to just retexture a hairstyle for crying out loud, and it's getting really frustrating! Anyone else getting this? I need to know I am not the only one!

Ugh. Finally logged out in frustration and now I can select them again. What a headache.