It's not necessary to take down the Genoa, just watch out for the securing screws as they try to abandon ship !!
However, whether any damage has been caused to the forestay, or to the foil around it you will only fully determine once the Genoa has been removed.
You haven't mentioned if all appears ok at the top of your Genoa, so it would be a good idea to take some binoculars and go and stand somewhere a couple of pontoons away and just check that you don't have a halyard wrap around the top part of the forestay. Again, this is discussed in the manual for which Lyra provided the website link, somewhere near to the back of it if I remember correctly. It is a very important piece of advice they give, but which is often overlooked when hoisting the Genoa.
All too often the head of the sail is shackled on to the top swivel, the tack then shackled to the furler attachment point and the sail pulled up through one of the grooves in the foil until the halyard is tight. At that point the halyard is secured within the jammer back in the cockpit, and it is assumed it's all been done right......WRONG !
If the sail has shrunk, or if it was made or cut too short in the first place then the angle between the halyard and the forestay cannot be achieved. Never attach the tack until after the sail has been hoisted as high as it will go, and if you now find that it's too high to permit the tack to be shackled to the furler, then simply attach it using a small line and take several turns of that line through each of the shackles until you are sure the attachment is strong enough, and pull it really tight before securing. Better still get your local sailmaker to come and take a look at your situation and modify the sail if it needs it.
If you get a halyard wrap, it can totally prevent the sail from being furled to the point where on my boat, the charterers on that occasion took the furling line to a winch, and using more brawn than brain they actually snapped the furling line. It was a bit drafty that day and the damage that occurred after they then decided to let go both of the sheets had to be seen to be believed. So that's how important it is to get the angle of the halyard in relation to the forestay correct.