@blackpbike Hi. If you read the solution for the original response on this thread there’s a guide that shows how to handle various important tasks on Windows 10 (most of them apply to other versions as well) to avoid permissions issues with third party apps including Pencil2D.
If you can’t see it here’s the direct link: [Guide] How to Train Your Pencil2D (Windows)
On this guide there are instructions and curated links that showcase many fundamental procedures to manage the downloads, including how to zip/ unzip files using the windows explorer only.
There’s no need to use a third party app. And as mentioned by CandyFace you do not need WinRAR, nor WinZIP or any paid software to unzip Pencil2D.
Since the guide is critical to maneuver and handle Pencil2D under Windows 10 due to reported problems with Windows OS aggressive security protocols, we recommend you to please take some time to review it.
Even if you end up not using Pencil2D and try other free and open source animation software, this guide will surely help you get around most common pain points for third party apps in such environment.