Hello, well I could have done that if I ever previously had installed launchbox, which was not the case.
anyways thanks to a very helpful person, I got finally launchbox 7.7 file and I have it installed and working properly (.net framework 4.6.1) in my for a long time to come offline classic/dos gaming machine (windows vista sp2) : ), so thanks to everyone involved in this, really easy to launch, import games and all the stuff so well done keep up the good work!
maybe make available a last version working per OS, even stating that it doesn't get support, wouldn't be a bad idea (yes saw the stats posted in this thread and maybe we can be considered irrelevant in numbers but xp and vista are still a better option for gamers to play old game versions, than the compatibility workaround in newer windows.., even running them in cabinets or vm without internet, that also dont get reflected in those stats..)