I used to rely on command-line and online methods, but like you, I needed something simpler and more reliable. I ended up trying Softaken Archive Converter, and it turned out to be exactly what I needed. The interface is very simple — you just load the RAR files, choose ZIP as the format, and hit convert. It works offline, so no internet dependency or file size limitations. One thing I like most is that it supports batch conversion and doesn’t compromise on the file structure. For Windows 10 users who want a straightforward offline tool, this is one of the best I’ve used.