I understood in the later '90s that Sibelius were not intending further work on the RISC OS side of their programme.
It would be nice if someone (DataStore?) could update !Sibelius7 with similar Sib3 for PC features and 32bit.
RISC OS & PC Sibelius both have features quite unique to each platform as I understand from us users & ex-Sibelius distributors in the Souther Hemiphere.
PC versions have heaps of plugins and new features (as expected), but the RISC OS version is far superior by means of RO desktop benefits, simplicity to use and teach in schools. The PC version is nowhere near as easy to use but is feature packed with many of add ons to use (which is useful if you have the time).