New versions of iDatabase require OS X 10.10 Yosemite or better to work. This is because of new Dropbox support architecture requirements. You can solve this problem by upgrading your system software to OS X 10.10 Yosemite.
If you prefer to use an old version of the operating system or you can't upgrade it, you can download the old version 3.20 of iDatabase by clicking this link:
Download old version 3.20 of iDatabase
This version can be used in Mac OS X previous of 10.10 Yosemite but please be aware that starting June 28, 2017, it doesn't support Dropbox
You can download the current version of iDatabase from our Download page, this version requires OS X 10.10 Yosemite or better.