After a couple of days playing with ISSS it seems there is no free way at the moment to update versions using a VMware environment.
So, I have take a copy of ISTA_P 2.46.3 and patched it with V48.1 files. Im after a couple of people to test the beta version I have. Be warned the download is 35GB! You will need an ICOM clone or Emulator to use it.
Please contact me by PM. Thanks.