diff --git a/lib/examples/sheet.gnumeric b/lib/examples/sheet.gnumeric
deleted file mode 100644
index 46c23960d0..0000000000
Binary files a/lib/examples/sheet.gnumeric and /dev/null differ
diff --git a/lib/examples/sheet.ods b/lib/examples/sheet.ods
deleted file mode 100644
index 7691d7f680..0000000000
Binary files a/lib/examples/sheet.ods and /dev/null differ
diff --git a/lib/examples/sheet.xls b/lib/examples/sheet.xls
deleted file mode 100644
index 7a9b00f776..0000000000
Binary files a/lib/examples/sheet.xls and /dev/null differ
diff --git a/lib/examples/spreadsheet.lyx b/lib/examples/spreadsheet.lyx
index 2c8edc35ea..e9f6e258b9 100644
--- a/lib/examples/spreadsheet.lyx
+++ b/lib/examples/spreadsheet.lyx
@@ -1,5 +1,5 @@
-#LyX 2.1 created this file. For more info see http://www.lyx.org/
-\lyxformat 417
+#LyX 2.0 created this file. For more info see http://www.lyx.org/
+\lyxformat 413
 \begin_document
 \begin_header
 \textclass article
@@ -33,7 +33,6 @@
 \use_esint 1
 \use_mhchem 1
 \use_mathdots 1
-\use_undertilde 1
 \cite_engine basic
 \use_bibtopic false
 \use_indices false