A few comments.

First, this software should be (more) free. It's for the most part merely an interface for the EDICT/KanjiDic volunteer projects. You have to pay more to access other volunteer projects such as the example sentences, and specialty dictionaries such as the one on Buddhism. I can understand that Sergey might want to charge for access to pay dictionaries such as Eijiro. But he should not charge for access to dictionaries that are compiled by volunteer effort.

Second, JEDict is updated so rarely (it's been more than a year since the last update), that it desperately needs a dictionary-update feature. New versions of EDICT, the main dictionary that JEDict uses, are made available nightly--often with hundreds of improvements made in a single day. The version of EDICT currently available in JEDict 4.7 is now woefully out-of-date. For instance, it was compiled before the Japanese tsunami on Mar. 11, 2011, after which HUGE efforts were made to improve EDICT's coverage of disaster terminology for tsunamis, nuclear reactors, etc. There needs to be a way to auto-update the dictionaries.

Kotoba! for iOS is now a far better (and completely free) alternative than JEDICT.