diff --git a/lazproj/coedit.lpi b/lazproj/coedit.lpi
index ed4ac89f..ba52dfbe 100644
--- a/lazproj/coedit.lpi
+++ b/lazproj/coedit.lpi
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <CONFIG>
   <ProjectOptions>
-    <Version Value="9"/>
+    <Version Value="10"/>
     <PathDelim Value="\"/>
     <General>
       <SessionStorage Value="InProjectDir"/>
diff --git a/src/ce_libmaneditor.pas b/src/ce_libmaneditor.pas
index fd8bdc1e..429805b1 100644
--- a/src/ce_libmaneditor.pas
+++ b/src/ce_libmaneditor.pas
@@ -131,7 +131,8 @@ end;
 
 procedure TCELibManEditorWidget.projClosing(project: ICECommonProject);
 begin
-  fProj := nil;
+  if fProj = project then
+    fProj := nil;
   if project = fFreeProj then
     fFreeProj := nil;
   updateButtonsState;
@@ -699,6 +700,7 @@ begin
     exit;
   LibMan.libraries.Delete(List.Selected.Index);
   List.Items.Delete(List.Selected.Index);
+  updateButtonsState;
 end;
 
 procedure TCELibManEditorWidget.btnSelProjClick(Sender: TObject);