I understand what you said. It is something typical to a lot of converters. I thought it is impossible to use the same converter for a long time because some errors appear after some months of using it. I understand you perfectly. I had changed a lot of converters. There were always some errors after some time of use, or they made me pay. I didn't want to pay for a website that is not so secure, and the quality is not so good. After some days of searching, I found a website - https://coconvert.com/youtube-wav-converter.html. Here now, I convert all my music from youtube. And yes, it is for free. You can try to convert through this site. Until no error occurred to me, and I hope it does not happen to me. I've been using it for more than half a year.