The chances are it is an excluded asset ( check the proposal wording)in which case usually OK to sell. But consider that there will be no credit available to get a replacement if needed.
But, as ever, confirm with Grant Thornton as not all IP's work the same way.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014