Bellow is my houdini.env file:
#
# Houdini Environment Settings
#
# The contents of this file are read into the environment
# at startup. They will override any existing entries in
# the environment.
#
# The syntax is one entry per line as follows:
# VAR = VALUE
#
# Values may be quoted
# VAR = "VALUE"
#
# Values may be empty
# VAR =
#
# Example:
#
# HOUDINI_NO_SPLASH = 1
# htoa config start
#HOUDINI_EXTERNAL_HELP_BROWSER = start
PATH = "$PATH;C:/ProgramData/Redshift/bin;C:/Users/Administrator/htoa/htoa-5.1.0_r9289183_houdini-18.0.348/htoa-5.1.0_r9289183_houdini-${HOUDINI_VERSION}/scripts/bin"
HOUDINI_PATH = "C:/Users/Administrator/AppData/Local/Thinkbox/Deadline10/submitters/HoudiniSubmitter;$HOUDINI_PATH;$QLIB;$MOPS;C:/ProgramData/Redshift/Plugins/Houdini/${HOUDINI_VERSION};C:/Users/Administrator/htoa/htoa-5.1.0_r9289183_houdini-18.0.348/htoa-5.1.0_r9289183_houdini-${HOUDINI_VERSION};&"
PXR_PLUGINPATH_NAME = "C:\ProgramData\Redshift\Plugins\Solaris\18.0.287;C:/Users/Administrator/htoa/htoa-5.1.0_r9289183_houdini-18.0.348/htoa-5.1.0_r9289183_houdini-${HOUDINI_VERSION}/hydra;&"
# htoa config end
OCIO ="D:\OpenColorIO-Configs-master\aces_1.0.3\config.ocio"
HOUDINI_DSO_ERROR = 2
#HOUDINI_SCRIPT_DEBUG = 1
#HOUDINI_SOHO_DEVELOPER = 1
#HOUDINI_USE_HFS_PYTHON = 1
#PATH = "$PATH"
#HOUDINI_PATH = "&"
HOUDINI_MENU_PATH = "C:/Users/Administrator/AppData/Local/Thinkbox/Deadline10/submitters/HoudiniSubmitter;$HOUDINI_MENU_PATH;&"