On Windows 10, having the debug parameters in double quotes did not let them work when running hop-gui.bat.  When removing the quotes, the parameters made it to java and the jdwp port 5005 was opened.
@@ -15,7 +15,7 @@ REM # Settings for all OSses
if "%HOP_OPTIONS%"=="" set HOP_OPTIONS="-Xmx2048m"
REM # optional line for attaching a debugger
-REM set HOP_OPTIONS=%HOP_OPTIONS% "-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005"
+REM set HOP_OPTIONS=%HOP_OPTIONS% -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005
REM Pass HOP variables if they're set.
if not "%HOP_AUDIT_FOLDER%"=="" (
