Tax relief on created intangible asset

I have a client who has created a revolutionary piece of software in a small company by himself and has now managed to sell licences for that software for a substantial sum leaving a hefty tax bill.

The booked expenses are less than £10K and the company is obviously small enough to be covered by FRSSE.

Is there a way at this late stage of getting any of the R&D or intangible asset tax reliefs for this company?
Neil Wilson