v3.3 [Mar 16, 2017]
1. Fixed the compatibility problem with 10.12
2. Fixed a bug that causes the output PDF still show the deleted content in a certain situation.
3. Other enhancements.
v3.0 [Dec 23, 2015]
1. Fixed a bug that caused problem when creating signature on system the latest OS version 10.11.
2. UI improvement, supports Retina display now.
3. Bug fixed for rotated PDF file, now the edited content will stay in the right position.
v1.6 [Jun 19, 2013]
1. Added start window for quickly open PDF file;
2. Added an options to lock aspect ratio when you resize inserted graphics;
3. Added 'Duplicate' button so you don't need to insert the same graphic and resize it every time;
4. Added 7 preset stamp graphics;
5. Fixed email problem, send signed PDF directly as attachment in email shortcut now;
6. Added an option to export your signature as .png image file;
7. UI Improvement.
