I’ve used JDownloader for years, and it’s been great. The ads are a bit annoying, but they’re harmless. Just don’t click on random stuff, and you’ll be fine.
I use Avast alongside it, and it’s been smooth. If you’re worried, maybe try a sandboxed version or run it in a VM.
I use Avast alongside it, and it’s been smooth. If you’re worried, maybe try a sandboxed version or run it in a VM.