diff --git a/om-graphs/expose-idea.ipe b/om-graphs/expose-idea.ipe
index 520aa4a07f357bf8c6c0f97196589a0f2b8ee217..4f9c6568dadc5b04ed243760832bbd7dd6264649 100644
--- a/om-graphs/expose-idea.ipe
+++ b/om-graphs/expose-idea.ipe
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE ipe SYSTEM "ipe.dtd">
-<ipe version="70212" creator="Ipe 7.2.13">
+<ipe version="70209" creator="Ipe 7.2.9">
 <info created="D:20210602142000" modified="D:20210819141114"/>
 <ipestyle name="basic">
 <symbol name="arrow/arc(spx)">
diff --git a/om-graphs/expose-phases.ipe b/om-graphs/expose-phases.ipe
index 517b5a32f33057cac5a9cda268736535b6d9a3df..791511042fd2a9cdefb3cd5bb135d2af5e53e469 100644
--- a/om-graphs/expose-phases.ipe
+++ b/om-graphs/expose-phases.ipe
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE ipe SYSTEM "ipe.dtd">
-<ipe version="70212" creator="Ipe 7.2.13">
+<ipe version="70209" creator="Ipe 7.2.9">
 <info created="D:20210602142000" modified="D:20210819163820"/>
 <ipestyle name="basic">
 <symbol name="arrow/arc(spx)">
diff --git a/om-graphs/expose-real.ipe b/om-graphs/expose-real.ipe
index de4a3a829d5469c207beba13e2b2059a468e63fc..0dde60d9154197743ff191f48afa7ff4511c5852 100644
--- a/om-graphs/expose-real.ipe
+++ b/om-graphs/expose-real.ipe
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE ipe SYSTEM "ipe.dtd">
-<ipe version="70212" creator="Ipe 7.2.13">
+<ipe version="70209" creator="Ipe 7.2.9">
 <info created="D:20210602142000" modified="D:20210825104345"/>
 <ipestyle name="basic">
 <symbol name="arrow/arc(spx)">
diff --git a/om-graphs/heavy-light.ipe b/om-graphs/heavy-light.ipe
index 16c53f7ea9d1a7923b5d9367156d8726ba17fa9f..5eef3b3b40fd7f4e390de576f54ef85c88a63643 100644
--- a/om-graphs/heavy-light.ipe
+++ b/om-graphs/heavy-light.ipe
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE ipe SYSTEM "ipe.dtd">
-<ipe version="70212" creator="Ipe 7.2.13">
+<ipe version="70209" creator="Ipe 7.2.9">
 <info created="D:20210602142000" modified="D:20210602145131"/>
 <ipestyle name="basic">
 <symbol name="arrow/arc(spx)">
diff --git a/om-graphs/lazy-update.ipe b/om-graphs/lazy-update.ipe
index 48c2aa40501886608940e74acea604a1b2f54516..7f66c72f876ddec347da88eea092208936575b0a 100644
--- a/om-graphs/lazy-update.ipe
+++ b/om-graphs/lazy-update.ipe
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE ipe SYSTEM "ipe.dtd">
-<ipe version="70212" creator="Ipe 7.2.13">
+<ipe version="70209" creator="Ipe 7.2.9">
 <info created="D:20210602104852" modified="D:20210602142558"/>
 <ipestyle name="basic">
 <symbol name="arrow/arc(spx)">
diff --git a/om-graphs/level-network.ipe b/om-graphs/level-network.ipe
index 41703e69ac726087c8107fc5ec13f41f45d76136..4931406e9cfb0366c7f812c17360a64847003a4e 100644
--- a/om-graphs/level-network.ipe
+++ b/om-graphs/level-network.ipe
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE ipe SYSTEM "ipe.dtd">
-<ipe version="70212" creator="Ipe 7.2.13">
+<ipe version="70209" creator="Ipe 7.2.9">
 <info created="D:20210602142000" modified="D:20210825150715"/>
 <ipestyle name="basic">
 <symbol name="arrow/arc(spx)">
diff --git a/om-graphs/middle-sons.ipe b/om-graphs/middle-sons.ipe
index 2254c15d358fd998846c1042805d7a7c6d4ecf70..1e965f87e0e18ea7c5504e30c8c787961be6045e 100644
--- a/om-graphs/middle-sons.ipe
+++ b/om-graphs/middle-sons.ipe
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE ipe SYSTEM "ipe.dtd">
-<ipe version="70212" creator="Ipe 7.2.13">
+<ipe version="70209" creator="Ipe 7.2.9">
 <info created="D:20210602142000" modified="D:20210819144219"/>
 <ipestyle name="basic">
 <symbol name="arrow/arc(spx)">
diff --git a/om-graphs/range-tree.ipe b/om-graphs/range-tree.ipe
index c9eb6995bfa5ad49ea1503e550176e03360dc5d1..f6f21c58f8fe1b3ee8c4e9a875b02074c50ceaf8 100644
--- a/om-graphs/range-tree.ipe
+++ b/om-graphs/range-tree.ipe
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE ipe SYSTEM "ipe.dtd">
-<ipe version="70212" creator="Ipe 7.2.13">
+<ipe version="70209" creator="Ipe 7.2.9">
 <info created="D:20210528110052" modified="D:20210803140920"/>
 <ipestyle name="basic">
 <symbol name="arrow/arc(spx)">