I downloaded the latest version of Serna. However, the function of copy-paste has disapeared. For example, if I click on an element in the tree, I cannot copy it. I must select the entire paragraph and only then click on copy.
If I want to copy in another open window of Serna, I drag the element. This erases it in the original document. I must then close the document without saving it to preserve the original text copied.