I am excited to see so many happy people using this extension. From what I have seen RoundCorner looks easy to use with amazing results... So far my experience has been the opposite. What I've read and researched so far is my issue is because I have a Mac that runs the latest Catalina OS and that my system is cap-sensitive. My issue cannot be isolated... I am one of countless users that operate on Macs and use SketchUp professionally. I urge @Fredo6 and/or someone with association to seriously look into this and offer a*'simple'*work around. Not everyone out there is an IT tech or a computer wizard to install back end code for an extension (Perhaps a PC or Mac extension option?). Anyhow, perhaps I'm still missing something. I still have hope and still look forward in using this extension in the future. Thank you for everyone who have listened and chimed in. Your efforts were much appreciated and I'm sure I'll be reaching out again for advice on something else in the future -Chet