The "4.0.432 - Updated" version specifically refers to iterations of the tool designed to handle files compiled with newer versions of the MetaTrader 4 build. As MetaQuotes (the developer of MT4) updates their compiler to be more secure, decompiler developers release "updated" versions to bypass these new security measures. Why Do Traders and Developers Seek Decompilers?
A developer may have lost their original .mq4 file due to a hardware failure or accidental deletion but still possesses the .ex4 version. Ex4 To Mq4 Decompiler 4.0.432 - Updated
Decompiling commercial software without the author's permission is generally a violation of Intellectual Property rights and End User License Agreements (EULAs). The "4