DotHLP and DotCHM have been renamed to Fast-Help and DotCHM Enterprise has been renamed to Fast-Help International.
Documentation Module. You can now compile to a Printable manual, MS Word compatible document or with Fast-Help and above, you can also compile to PDF as well.
Website Help. With Fast-Help and above you can now compile your data as a fully working website, complete with table of contents, index and search engine
Tasks. You can now manage all your Todo's
Auto Scroll support for mouse-wheel
Nonscroll support in Html
Conditions. Replacing Filters. Conditions are similar to the concept of conditional compiles in languages such as Delphi and C++
Browse buttons now added and automatically managed for Nonscroll regions
Integrated Hotspot editor
Merge support for HtmlHelp Projects
Unicode support. You can now enter text in any language in the world
Bi-directional editing and support for Asian and Eastern languages
The Translation Assistant has been completely rewritten and now sports a much more intuitive interface with status icons to monitor the translation status of text.
Template support for loading consistent Topic layouts
Changes from v2 to v3
Keywords: In v2 you could add keywords above the help text. Now there is a central Index which mimics what you see in your compiled help file. You can add keywords by using the toolbar button on the Index tab, or by right-clicking selected text in the editor and selecting "Add as a keyword" from the menu
No more Font Registry. You can now add whatever fonts you like and these will be managed internally by Fast-Help.
Popups in HtmlHelp. Previously you could only create Text Popups, a limitation of Microsoft's HtmlHelp. However, we have overcome this limitation and offer you three possibilities.  Continue to use Text Popups.  Html Popups, which use an activeX.  WinHelp Popups within a CHM file, as Microsoft's own help system does. This gives you maximum flexibility and you can flick between any of these choices at the click of a button
No more ruler. As help systems become more Html centric rather than document centric, the concept of a ruler is less relevant and has been dropped
Tabs were always a problem with WinHelp and HtmlHelp. Now tabs are handled using cascading style sheets in a more intelligent way, but tabs are a document centric concept and have a lesser role in html. But the effect of the new editor in Fast-Help is that you will get a much more consistent result no matter what you type or tab in
No more Inheritance. The inheritance feature was deemed to be rarely used and did not merit the huge maintenance to continue it into v3
WinHelp support for 16bit help files, for use in Windows v3.1 has been dropped
PocketPC support is not in the first release of v3 as it was not ready. We are working on a much more powerful PocketPC release for the near future.
Database back end has now changed to the MS Access format
Table support is now complete. There is now huge flexibility in what you can do.
Links are now much more powerful
Variables now support full formatting whereas before they were plain text
Much more powerful html export features in the new and more powerful editor
Contents editor is now on the main tab. Split View and Contents View have been merged
Filter View is gone and now there is a Properties tab below the help text editor where you can change properties
Drag and drop support in Contents
Popups are now handled separately from Topics and have their own tab at the bottom of the contents section on the left.