sp331yi was specifically asking about 3.x versions because of what I wrote in
another thread. To expand a bit, here my (somewhat terse) notes about Master PDF Editor:
Code:
example usage: masterpdfeditor5 file.pdf -p 2
--read-only : switches application to read only
--read-write : switches application to edit mode
--check-updates : allows application to check for updates
--no-check-updates : forbids application from checking for updates
--set-register license_key : activate application
--set-unregister : deactivate application
-p : the page number of the document to display
--full-help : show this output
--help, -h : usage
mpe5 linux free features:
fill/save forms add/edit bookmarks
comment/annotate split/merge create from scan/images
mpe5 non-free features (* - were free in mpe3):
edit text/images* create form* optimize paste 2 multi
manage JS properties* digi sign
watermarks(4.0) backgrounds(4.0) head/foot(4.0) 256bitAES(4.1)
Basically, the only compelling free feature from MPE 3.x that was made paid for in MPE 4.x and 5.x is the ability to create PDF forms. Editing of text/images could also be done with Inkscape, and metadata properties like creation date and author's name could be changed with several other tools, either GUI or command line.
Speaking of MPE 5.x, split/merge and creating PDF from scans/images also could be done with many other tools.