Ok, a little more information on this as I've tried everything and nothing seems to be working! All pages (except home) are given the "default template". In the Corona settings I have set the default to "...sidebar right". I have added a PayPal Donations widget (but I have tried many others, even a simple text widget, that dont work either) to both "Display Everywhere (right)" and "Pages (right)" and still nothing appears on my pages. Even after shift refresh and clearing cache. I even just tried to add a sidebar to a page using the Corona > Theme Settings > Sidebar option and that didn't work either.
Maybe I can give you access and you can have a look, Kriesi?