Hello Salabim,
1) My old website (emurasoft.com) is not XHTML, but HTML, so it is still valid ( can work without a closing tag). The tag on the first line can tell whether the page is HTML or XHTML.
2) By default, HTML documents will not prompt to choose an encoding. This can be customized by selecting configuration properties, the File tab, click the “Saving…” button, and then set the “Save Unicode as HTML/XML Character Reference” check box.
Thank you!