I think it's clear that RO 5 is the PACE (in-house) version of RO, separately licensed to CTL by PACE. Rumours of source code being illegally gained are, IMHO, just silly. Every Iyonix comes with (came with?) a piece of paper explaining PACE's ownership of the IPR - surely PACE would not have tolerated that if it wasn't true?
What is less clear is whether PACE had the right to license it as ROL may have previously been granted an *exclusive* desktop licence (including the right to sub-license to others). ROL might justifiably believe it was owed some royalties somewhere along the line.
This latter is further complicated by the fact that the PACE and CTL rights are now all with CTL. It's a soap-opera this one, let's just hope the script writers have a happy ending in mind