Nice to see you on the forum here Huggy59.
There are many Homeseer 2 users out there in Internetlandia that continue to utilize Homeseer 2 and it works fine for them.
Yup here used an Ocelot in the late 1990's / early 2000's with Homeseer 2.
Today here still utilize X10 CM11A's, TW-523's and Jeff Volp's XTB and dual phased TW-523 emulator (XTB IIR).
XTB Products picture. Note that this stuff costs more than CM11A's and TW523's and is worth the money paid. I have shipped one of Jeff's products over to the UK for testing and it worked better than the legacy CM11A and TW-523 products. Note I do not work for Jeff and just wanted to keep X10 going in my house.
Homeseer 2 CM11A plugin was broken in 2005 and never got fixed. The TI-103 X10 device and plugin did get fixed.
I did utilize a TI-103 way back in the early 2000's and was never impressed with it and did abandon any efforts of its use.
I have migrated my in wall lighting switches from X10 to Insteon and currently using UPB. I have no issues with UPB today.
I play today with multiple Z-Wave / Zigbee wireless networks but do not really utilize them much for my automation. Newest play is with a RPi2 with a Z-Wave Plus GPIO card in the attic with a POE connection. I can move one Z-Wave device (have 5 in the garage) to one side of the garage and the RPi2 doesn't see it.
I have 5 Z-Wave networks running and do not mix wireless devices with wired (HV plugged in); never have.
Only have played with wireless Zigbee stuff which is doing OK but have had to replace batteries before a year is up.
Relating to Homeseer 3 I have switched over to Linux and the CM11A works great. I am also using X10 play stuff with Linux based automation programs and have absolutely no issues with the X10 running today in the house.
That and I have a Wintel 32 bit server VB running on the Ubuntu Box that runs HS2/HS3 stuff just fine. You can if you want run a VB of HS2 and have it chit chat with HS3 via Jon's HS2-HS3 plugin. I have tested this plugin to work fine.
I am also utilizing 1-2-3 W800's and really only need the one mounted in the attic today. I did migrate over to a W800 from the MR26A many years ago.
I am also running X10, UPB and Z-Wave via the Leviton OmniPro 2 combo panel and have no issues today with it.