1.4.7.55 seems to work pretty well with IC-705 driver to control my X6100 from WSJTx RC. Issue I reported of older alpha having to be in run in admin mode to talk to WSJTx seems fixed. Note: IC-705 driver works better than X6100 driver for filter and mode settings. Split mode operation, however, is complicated due to the X6100 not changing VFO B mode on (CAT) command - you have to set VFO B mode manually for it to be what you want in split operation.