Keyboard Maestro uses the following code-block to determine whether the application is registered or not:

0000000100022503 E8B0D9FFFF                      call       __ZN8KMSerial12IsRegisteredEv_10001feb8 ; KMSerial::IsRegistered()
0000000100022508 84C0                            test       al, al
000000010002250a 756A                            jne        0x100022576

the instruction jne can also appear as je. The jumps have the following outcome:

• the jne jump is executed if the application is registered so replace with jmp
• the je jump is executed if the application is not registered so nop

And that is all you need to crack this application. You then follow XREFs for ZN8KMSerial12IsRegisteredEv_10001feb8 and apply the logic above to every instance. ====== Decorations ====== By performing the procedure above for all jne and jes after ZN8KMSerial12IsRegisteredEv_10001feb8, we will have the About Keyboard Maestro popup show the following:

So, we use NIBUnlocker and decompile /Applications/Keyboard Maestro.app/Contents/Resources/English.lproj/About.nib to About.xib in order to remove the line containing the Registered to string:

--- About.xib	2015-01-04 01:02:03.000000000 +0000
+++ About.xib	2015-01-04 01:01:26.000000000 +0000
@@ -108,8 +108,6 @@
                             <bool key="NSAllowsLogicalLayoutDirection">NO</bool>
                             <object class="NSTextFieldCell" key="NSCell" id="19">
                                 <int key="NSCellFlags">69206081</int>
-                                <reference key="NSControlView" ref="17"/>
-                                <string key="NSContents">Registered To</string>
                                 <int key="NSCellFlags2">138414080</int>
                                 <reference key="NSBackgroundColor" ref="56"/>
                                 <object class="NSFont" key="NSSupport" id="59">
@@ -206,7 +204,7 @@
                             <object class="NSTextFieldCell" key="NSCell" id="42">
                                 <int key="NSCellFlags">68157504</int>
                                 <reference key="NSControlView" ref="41"/>
-                                <string type="base64-UTF8" key="NSContents">wqkgU3RhaXJ3YXlzIFNvZnR3YXJlIFB0eSBMdGQuIDIwMDQtMjAxMw</string>
+                                <string type="base64-UTF8" key="NSContents">wqkgU3RhaXJ3YXlzIFNvZnR3YXJlIFB0eSBMdGQuIDIwMDQtMjAxM8</string>
                                 <int key="NSCellFlags2">138413056</int>
                                 <reference key="NSBackgroundColor" ref="56"/>
                                 <object class="NSFont" key="NSSupport" id="64">
@@ -270,14 +268,6 @@
                 </object>
                 <object class="IBConnectionRecord">
                     <object class="IBOutletConnection" key="connection">
-                        <string key="label">registeredToTextField</string>
-                        <reference key="source" ref="2"/>
-                        <reference key="destination" ref="17"/>
-                    </object>
-                    <int key="connectionID">63</int>
-                </object>
-                <object class="IBConnectionRecord">
-                    <object class="IBOutletConnection" key="connection">
                         <string key="label">timeSavedTextField</string>
                         <reference key="source" ref="2"/>
                         <reference key="destination" ref="23"/>
@@ -326,14 +316,6 @@
                 </object>
                 <object class="IBConnectionRecord">
                     <object class="IBActionConnection" key="connection">
-                        <string key="label">openConvert:</string>
-                        <reference key="source" ref="2"/>
-                        <reference key="destination" ref="17"/>
-                    </object>
-                    <int key="connectionID">70</int>
-                </object>
-                <object class="IBConnectionRecord">
-                    <object class="IBActionConnection" key="connection">
                         <string key="label">openApplicationWebSite:</string>
                         <reference key="source" ref="2"/>
                         <reference key="destination" ref="29"/>
@@ -393,7 +375,6 @@
                             <reference ref="23"/>
                             <reference ref="29"/>
                             <reference ref="35"/>
-                            <reference ref="17"/>
                             <reference ref="41"/>
                             <reference ref="7"/>
                         </object>
@@ -456,20 +437,6 @@
                         <reference key="parent" ref="35"/>
                     </object>
                     <object class="IBObjectRecord">
-                        <int key="objectID">54</int>
-                        <reference key="object" ref="17"/>
-                        <object class="NSMutableArray" key="children">
-                            <bool key="EncodedWithXMLCoder">YES</bool>
-                            <reference ref="19"/>
-                        </object>
-                        <reference key="parent" ref="6"/>
-                    </object>
-                    <object class="IBObjectRecord">
-                        <int key="objectID">55</int>
-                        <reference key="object" ref="19"/>
-                        <reference key="parent" ref="17"/>
-                    </object>
-                    <object class="IBObjectRecord">
                         <int key="objectID">56</int>
                         <reference key="object" ref="41"/>
                         <object class="NSMutableArray" key="children">

Recompiling with ibtool –notices –output-format human-readable-text –compile About.nib About.xib we replace the original About.nib with the newly generated About.nib and obtain:

That's all.