The 1.0034 is available for download on our website in the archives. It is the latest 1.0xxx version. http://cncdrive.com/UCCNC.html Just fully roll down the page and you will find the link to the download.
Umm... It's interesting. I installed the 1.0034 from the link and it sais, it's 1.0034, but only knows the UC100. I have an old download from 2014 October, version 1.0034 and it already knows the UC300_5LPT. Both shows in help/about 1.0034, but they are completely different.
Make sure to delete the UCCNC.config file if you installed that early version over the 1.21xx version, because those new versions run on .net 4.0 and so the config file is required to allow to load 3rd party plugins, but the old software installer does not delete the config file and also because it runs on .net 2.0 a config file is not installed. And so if the new version's config file remains there then the app will crash because it tells Windows that the app requires .net 4.0 while it is .net 2.0 code.
Then maybe the Flashplayer is missing from the computer or has the bug which was introduced at the time when we ported the whole UCCNC to OpenGL from Flash. I did not follow up on if Adobe ever fixed that Flashplayer bug or not, because we no more needed it, so it is just a guess.