This Hex Editor is versatile yet very powerful.

Features
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1. Text Search/Replace
2. Hex Search/Replace

Text wildcard Search & Replace
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e.g. HEL? would find all words that begin with "HEL"
e.g. HE?P would find all words that begin with "HE" and one unknown letter and then end with P


Hex Pattern Wildcard Search & Replace
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e.g. 55??AA would find all Hex patterns that start with 55
then an unknown hex value followed by AA
e.g. 55??AA??BB would find all Hex patterns that start with 55 then an unknown 8bit hex value followed by AA, then an unknown hex value followed by BB

4Bit Search/Replace Feature (*New*)

e.g. 5???AA??BB would find all Hex patterns that start with '5' then an unknown 4bit hex value and an unknown 8bit hex value followed by AA, then an unknown 8bit hex value followed by BB

https://youtu.be/MsbWYjv3cqo