Hi BjjChoke and welcome to the forum.
I don't own a V4 equipped saber so I haven't downloaded the software but I did a quick search of the forum and this link to a post by the forum owner/admin Emory "Deep" Harris might have the link you are looking for. The post was last updated in 2022 and I couldn't find a newer reference to the V4 launcher.
Anyhoo I will post the link here to the page and maybe a current member and V4 user here can verify it is the correct package before he loads it please? Hope this helps.
https://www.saberforum.com/index.php?topic=23237.msg348663#msg348663
