I have uninstalled V3, installed V4 on a NAS drive, I am running XPpro SP3. When I tried to open the program I got a message saying that Utility.dll is missing and to try re-installing. utility.dll was in the DesignSpark PCB folder though. I have tried uninstalling and re-installing a couple of times but no different. I have found that the problem was caused by a number of the dll files having upper or lower case letters not matching. I renamed the files as the error messages came up to match the name in the error message, after renaming six or seven files the program has now started.
I suspect it is the NAS drive that is the problem here. Many (or perhaps even most) NAS drives implement their file sharing using something called SAMBA that runs on a small embedded version of Linux. Being Linux-based, they are by default case sensitive, unlike Windows. So on one of these drives I believe you can have two files called utility.dll and Utility.dll in the same folder, because they are treated as different names.
This isn’t a problem we’ve come across before, but a quick hunt using Google shows that if their NAS drive is indeed SAMBA-based, it should be possible to configure it to turn off case sensitivity.