diff --git a/data_from_portwine/scripts/start.sh b/data_from_portwine/scripts/start.sh
index c6d138bc..d8ce7c99 100755
--- a/data_from_portwine/scripts/start.sh
+++ b/data_from_portwine/scripts/start.sh
@@ -6,7 +6,8 @@ export url_site="https://linux-gaming.ru/portproton/"
 export url_cloud="https://cloud.linux-gaming.ru/portproton"
 export url_git="https://git.linux-gaming.ru/CastroFidel/PortWINE"
 ########################################################################
-if [[ "${START_FROM_FLATPAK:-0}" == 1 ]] && command -v "flatpak" &>/dev/null; then
+if [[ "${START_FROM_FLATPAK:-0}" == 1 ]] && [[ -z "${STEAM_COMPAT_DATA_PATH:-}" ]] && command -v "flatpak" &>/dev/null; then
+    unset START_FROM_FLATPAK
     flatpak run ru.linux_gaming.PortProton "$@"
     exit
 fi
@@ -100,7 +101,7 @@ fi
 unset MANGOHUD MANGOHUD_DLSYM PW_NO_ESYNC PW_NO_FSYNC PW_VULKAN_USE WINEDLLOVERRIDES PW_NO_WRITE_WATCH PW_YAD_SET PW_ICON_FOR_YAD
 unset PW_CHECK_AUTOINSTALL PW_VKBASALT_EFFECTS PW_VKBASALT_FFX_CAS PORTWINE_DB PORTWINE_DB_FILE RADV_PERFTEST
 unset CHK_SYMLINK_FILE PW_MESA_GL_VERSION_OVERRIDE PW_VKD3D_FEATURE_LEVEL PATH_TO_GAME PW_START_DEBUG PORTPROTON_NAME PW_PATH
-unset PW_PREFIX_NAME WINEPREFIX VULKAN_MOD PW_WINE_VER PW_ADD_TO_ARGS_IN_RUNTIME PW_GAMEMODERUN_SLR PW_WINE_CPU_TOPOLOGY
+unset PW_PREFIX_NAME VULKAN_MOD PW_WINE_VER PW_ADD_TO_ARGS_IN_RUNTIME PW_GAMEMODERUN_SLR PW_WINE_CPU_TOPOLOGY
 unset MANGOHUD_CONFIG FPS_LIMIT PW_WINE_USE WINEDLLPATH WINE WINEDIR WINELOADER WINESERVER PW_USE_RUNTIME PORTWINE_CREATE_SHORTCUT_NAME MIRROR
 unset PW_LOCALE_SELECT PW_SETTINGS_INDICATION PW_GUI_START PW_AUTOINSTALL_EXE NOSTSTDIR RADV_DEBUG PW_NO_AUTO_CREATE_SHORTCUT
 unset PW_TERM PW_EXEC_FROM_DESKTOP WEBKIT_DISABLE_DMABUF_RENDERER PW_AMD_VULKAN_USE PW_VK_ICD_FILENAMES LAUNCH_URI
@@ -199,6 +200,7 @@ if [[ -n "${STEAM_COMPAT_DATA_PATH:-}" ]]; then
     steamplay_launch "${@:2}"
     exit
 fi
+unset WINEPREFIX
 
 # check PortProton theme
 if [[ -n "$GUI_THEME" ]] \