diff --git a/install.sh b/install.sh
index 8c9db8b..38cb81c 100755
--- a/install.sh
+++ b/install.sh
@@ -3,7 +3,7 @@
 set -euo pipefail
 
 SOURCE_ROOT="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
-VERSION="${PTLINUX_VERSION:-0.5.2}"
+VERSION="${PTLINUX_VERSION:-0.5.8}"
 if [[ ! "$VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]
 then
 	printf 'Invalid launcher version: %s (expected X.Y.Z)\n' "$VERSION" >&2
@@ -133,6 +133,7 @@ RELEASE_ROOT="${RELEASES_ROOT}/${VERSION}"
 if [[ ! -d "${SOURCE_ROOT}/ptlinux" \
 	|| ! -f "${SOURCE_ROOT}/ptdiag/assbin.py" \
 	|| ! -f "${SOURCE_ROOT}/ptdiag/__init__.py" \
+	|| ! -f "${SOURCE_ROOT}/ptdiag/logs.py" \
 	|| ! -f "${SOURCE_ROOT}/ptlinux/desktop_entry.py" \
 	|| ! -f "${SOURCE_ROOT}/ptlinux/launcher_wrapper.py" \
 	|| ! -f "${SOURCE_ROOT}/ptlinux/self_update.py" \
@@ -197,6 +198,7 @@ install -m 0644 \
 	"${STAGING_RELEASE}/ptlinux/launcher-update-public.pem"
 install -m 0644 "${SOURCE_ROOT}/ptdiag/__init__.py" "${STAGING_RELEASE}/ptdiag/__init__.py"
 install -m 0644 "${SOURCE_ROOT}/ptdiag/assbin.py" "${STAGING_RELEASE}/ptdiag/assbin.py"
+install -m 0644 "${SOURCE_ROOT}/ptdiag/logs.py" "${STAGING_RELEASE}/ptdiag/logs.py"
 printf '{\n  "schema": 1,\n  "version": "%s"\n}\n' "$VERSION" > "${STAGING_RELEASE}/release.json"
 chmod 0644 "${STAGING_RELEASE}/release.json"
 
@@ -301,8 +303,44 @@ then
 	update-desktop-database "$APPLICATION_HOME" >/dev/null 2>&1 || true
 fi
 
-printf '%s\n' "Application installed."
+printf '%s\n' "Launcher files installed."
+DOCTOR_READY=1
 if (( RUN_DOCTOR == 1 ))
 then
-	"${BIN_HOME}/pristontale-eu" doctor || true
+	if ! "${BIN_HOME}/pristontale-eu" doctor
+	then
+		DOCTOR_READY=0
+	fi
+else
+	printf '%s\n' "Host readiness check skipped."
 fi
+
+printf '%s\n' "Start PristonTale EU with:"
+printf '  %q gui\n' "${BIN_HOME}/pristontale-eu"
+case ":${PATH:-}:" in
+	*":${BIN_HOME}:"*)
+		;;
+	*)
+		printf '%s\n' \
+			"Note: ${BIN_HOME} is not in PATH for this shell." \
+			"The application-menu shortcut already uses the full path."
+		if [[ "${SHELL##*/}" == "fish" ]]
+		then
+			printf '%s\n' "Enable the short command in Fish with:"
+			printf '  fish_add_path %q\n' "$BIN_HOME"
+		else
+			printf '%s\n' "Enable the short command in this Bash/Zsh session with:"
+			printf '  export PATH=%q:"$PATH"\n' "$BIN_HOME"
+		fi
+		;;
+esac
+
+if (( DOCTOR_READY == 0 ))
+then
+	printf '%s\n' \
+		"Launcher files were installed, but this host is not ready to run the game." \
+		"Resolve the diagnostics above, then run the launcher command again." >&2
+	exit 1
+fi
+
+printf '%s\n' "Installation ready."