The Isotope is designed to be righted by a single individual with the use of a righting bar and some degree of upper body strength. The jib should be uncleated and the main partially cleated so as to keep the battens from going fully underwater (and breaking). 
 
Failed Righting Bar
Sheet over the side - and pull.  In theory, this technique should work. This is the first time Eric has tried it. He used the mainsheet as he could not throw the jib sheet over the high hull with the angle he had to work with.
Really Pull.  Notice the mast is a bit more out of the water, but not much.
Safety Boat Assist-  Notice that
  1) I'm wearing my life jacket. 
  2) I'm fuly extended out over the water so as to reach the sumberged mast. A boat hook would also help.
Slowly lift the mast head because 
  1) It is quite heavy, probably because it has water in it. 
  2) So as to not break the battons in the main as the sail is lifted out of the water.
Stand upright,
Adam slowly motor towards the capsized boat as I walk up the mast.  Eric continues to use his body weight to try to right the boat. 
Amazing how long the mast is and how high we had to hoist it in the air.
Voila - the boat finally continues upright on its own.