Fix installed instance not finding files at relative paths.

diff --git a/plomlib b/plomlib
index 8692e6dd3c9f5803def5f42b570c5a5f8027f11e..b94a38cf70d76ae850a22fec79913a68418c4d99 160000 (submodule)
--- a/plomlib
+++ b/plomlib
@@ -1 +1 @@
-Subproject commit 8692e6dd3c9f5803def5f42b570c5a5f8027f11e
+Subproject commit b94a38cf70d76ae850a22fec79913a68418c4d99