diff --git a/bin/sls_hla_launch_gui.sh b/bin/sls_hla_launch_gui.sh
index 88de269..dbcc663 100755
--- a/bin/sls_hla_launch_gui.sh
+++ b/bin/sls_hla_launch_gui.sh
@@ -5,11 +5,8 @@ AGEBD_ENV=$2  # 'dev' for dev environment, any other string launches prod.
 REMAINING_ARGS=( "${@:3}" )
 
 if [ "$AGEBD_ENV" = "dev" ]; then
-    AGEBD_ENV_SUFFIX="-DEV"
     EPICS_CA_ADDR_LIST="$EPICS_CA_ADDR_LIST 129.129.146.255"
-else
-    AGEBD_ENV_SUFFIX=""
 fi
 
 export EPICS_CA_ADDR_LIST
-caqtdm -macro "AGEBD_ENV_SUFFIX=${AGEBD_ENV_SUFFIX}" "${REMAINING_ARGS[@]}" "${UI_FILENAME}" 
+caqtdm "${REMAINING_ARGS[@]}" "${UI_FILENAME}"
diff --git a/docs/user/gui.md b/docs/user/gui.md
index beb14b6..4f3b281 100644
--- a/docs/user/gui.md
+++ b/docs/user/gui.md
@@ -16,8 +16,8 @@ In `dev`:
 ./bin/sls_hla_launch_gui.sh qt/A_BD_InjectionGuard.ui dev
 ```
 
-If you need to pass another macro variable in `dev`, you will need to set `AGEBD_ENV_SUFFIX` explicitely:
+Any extra arguments are passed straight through to `caqtdm`, e.g. to set a macro:
 
 ```
-./bin/sls_hla_launch_gui.sh qt/A_BD_Tune.ui dev -macro "AGEBD_ENV_SUFFIX=-DEV, OTHER_ENV_VAR=HEYHEY"
+./bin/sls_hla_launch_gui.sh qt/A_BD_Tune.ui dev -macro "OTHER_ENV_VAR=HEYHEY"
 ```