So, I just found out that PrimoCache is still being worked on.
How do you ask? Well, v4.5 exists and can be found and downloaded.
I won't link it here, and I ask everyone to do the same. There must be a reason why this version isn't mentioned on the homepage, why there hasn't been an announcement in the forum, and why the software itself doesn't find this as an update. It might be buggy, it might be unfinished, it might just an internal test-build.
If you have to ask how to get it, then please don't bother at all and just wait until an officially supported update is available.
Be careful.
I think I have said enough, and hope the devs don't hate me. I'm just happy to see this project isn't dead and wanted to share the news.