I've tried X1 for a PC and it's a wonderful tool that indexes text files, word docs, ppt, pdf files and allows you to search all of them at once. Everything is indexed so it is not slow. Currently, ...

TL;DR: Get a SwiftDoo PDF Pro lifetime license for Windows at $29.97 (reg. $129)—you’ll gain access to tools like PDF editing, signing tools, and so much more. Subscriptions have taken over everything ...