diff --git a/.gitignore b/.gitignore
index b1cd1d0..7d97f86 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,7 @@ GeneratedFiles
 *.suo
 *.user
 build*
+Thumbs.db
 
 # bundled thirdparty libraries
 /thirdparty/lzo
diff --git a/doc/Thumbs.db b/doc/Thumbs.db
deleted file mode 100644
index 912b376..0000000
Binary files a/doc/Thumbs.db and /dev/null differ
diff --git a/stuff/doc/img/Thumbs.db b/stuff/doc/img/Thumbs.db
deleted file mode 100644
index 6083fa0..0000000
Binary files a/stuff/doc/img/Thumbs.db and /dev/null differ
diff --git a/stuff/library/custom styles/Thumbs.db b/stuff/library/custom styles/Thumbs.db
deleted file mode 100644
index b30123c..0000000
Binary files a/stuff/library/custom styles/Thumbs.db and /dev/null differ
diff --git a/stuff/library/particles/Thumbs.db b/stuff/library/particles/Thumbs.db
deleted file mode 100644
index e6106fd..0000000
Binary files a/stuff/library/particles/Thumbs.db and /dev/null differ
diff --git a/stuff/library/textures/Thumbs.db b/stuff/library/textures/Thumbs.db
deleted file mode 100644
index be9208d..0000000
Binary files a/stuff/library/textures/Thumbs.db and /dev/null differ
diff --git a/toonz/sources/toonzqt/Resources/fxicons/Thumbs.db b/toonz/sources/toonzqt/Resources/fxicons/Thumbs.db
deleted file mode 100644
index e8137dc..0000000
Binary files a/toonz/sources/toonzqt/Resources/fxicons/Thumbs.db and /dev/null differ