Help+Manual automatically converts the project files from older versions with obsolete formats (H+M 3 and H+M 4) when you open them. Alternatively, you can also use the standalone converter program to convert old projects manually.

Help+Manual 4 projects are generally converted 1:1 and do not require any post-processing after conversion. Older Help+Manual 3 projects did not have the styles and other features introduced in the modern versions of the program and may require some reformatting after importing.

Backward compatibility with Help+Manual 5 and later:

All Help+Manual projects created with version 5 and later are fully backward-compatible and require no conversion. Just open them in Help+Manual 10 and start editing.

You can edit projects saved with Help+Manual 10 in earlier versions but this is not generally recommended. Any new features will be stripped out by the older versions when you do this. If you are working on projects in a team all team members should also be using exactly the same version.

See also:

Choosing your save mode

The Project Converter