If you dedicate yourself professionally to the design of Websites then FlexSite32 is not the type of website editor you are looking for, because it is a fairly basic, simple and low-performance tool that is geared towards all those users who are starting to Design your first websites and you don't have much experience yet.
The FlexSite32 web editor uses the WYSIWYG method (what you see in what you get) which is very useful for all those novice users who still get involved with the HTML code and its different commands, because here it is automatically generated as you add new elements to your web design, dividing the screen into two parts, one with the source code in HTML and another in graphic mode where you can see the results without previewing.
FlexSite32 allows to work with numerous pages open at the same time (it manages them by tabs), having a spell checker, being able to add frames (frames), tables, lists, buttons (which can be customized by the user himself), etc.
You can free download FlexSite32 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.