A few things. I don't know if you can call them bugs or problems or suggestions for the future.
1. When trying to change my default website project folder via Tools/Preferences/Folders, the change appears to have been accepted, but the program crashes. I have managed to change it, but had to grovel in the registry to do so. There really ought to be an easier way!
2. Using the editor to work with CSS style sheets, there are a couple of oddities. For example when creating a definition, once you put the cursor between the curly braces, and start typing, a list of possibilities drops down. Great!! Now, type wi (and select width) - further possibilities appear - the possible parameters. With width and many others showing dimensions you have several options
such as auto|inherit|length|percentage. Great again. but if you click on one - say length, the string "length" is entered. This isn't usually what's needed. It might be better if a further choice were offered between absolute measures such as px and relative ones such as em and once this was entered , the cursor placed before it, to facilitate adding the figures. When percentage is chosen - particularly useful for RWD it isn't much help for the string "percentage" to be entered. Surely it wold be better if the actual percentage char % were entered and the cursor placed just before it. to allow us to enter the figure ourselves. Same sort of thing happens with color. For example while background-color: inherit; is fine, background-color:color; isn't really a lot of help!
3. I write quite a lot of websites in French as well as English. The "character" tab is pretty cumbersome to use, so I tend to use the ALT-xxx method to insert the accented letters, or the euro symbol or various other entities. I then go though scanning for "undocumented characters" which does fine for common things like é or è but doesn't pick up on the degree symbol ° or the euro symbol € . Would it be possible to cast the net a little wider when searching for these. Also - here's an odd one. My websites use GPS coordinates in degrees, minutes and seconds. thus N 45°15'45" searching for undocumented characters picks up on the " but misses the other two. Oops.
5. In HTML5 (at least, but it started earlier) the internal anchor tag of name is now deprecated in favour of id. At the moment using Insert/Target "tagname" puts the code <a name="tagname"></a> instead of the <a id="tagname"></a> that is currently recommended by the w3c.
Phew... hope you don't mind such a ragbag of suggestions.
All the Best
Ian