Applies to: DrawPlus X3, DrawPlus X4, and above
DrawPlus X3 was the first version of DrawPlus to use the new XML file
format and so all versions from X3 onwards will be able to open files
made in later versions.
You can open an X4 file in X3, but all new objects and features
introduced in X4 will be stripped from the file. As such, it is
recommended that you save the file to a new file name using X3 so that
the original version does not lose its X4 features permanently.
This will be true of all future releases (X5 and onwards) which also use the
XML file format.
All versions of DrawPlus continue to be backwards compatible, so newer
versions can still load files from older versions.