Isolated methods like this have been removed because they work against the Metadata Working Group compliance rules and may cause EXIF and XMP to get out of synch - which would be bad. Just copying the EXIF data if the target file also has XMP can cause irritating and wrong results. If you really need to do this, you can to it with ExifTool directly, e.g. with exiftool -exif:all -tagsfromfile src.jpg -exif:all dst.jpg or similar.
I suggest you look into the comfortable metadata manipulation methods available in IMatch 5 scripting (TagInfo, TagData, TagValue), which are easy to use and also allow IMatch to stay in control of things and to apply mapping rules for EXIF/IPTC/XMP/GPS when writing the data to the actual file.
There are also built-in features to copy metadata, like Ferdinand explained. In addition to file relations with propagation there is Copy Attributes, the copy features in the Metadata Panel, the Batch Processor etc.