diff --git a/extra/darwin/engine/aria2.conf b/extra/darwin/engine/aria2.conf
index 4377be3..f8d1c8f 100755
--- a/extra/darwin/engine/aria2.conf
+++ b/extra/darwin/engine/aria2.conf
@@ -106,3 +106,8 @@ seed-ratio=1.0
 bt-seed-unverified=true
 # 保存磁力链接元数据为种子文件(.torrent文件), 默认:false
 bt-save-metadata=false
+# Removes the unselected files when download is completed in BitTorrent.
+# To select files, use --select-file option. If it is not used,
+# all files are assumed to be selected. Please use this option with care
+# because it will actually remove files from your disk. Default: false
+bt-remove-unselected-file=true
diff --git a/extra/linux/engine/aria2.conf b/extra/linux/engine/aria2.conf
index d3c6f49..d10c418 100755
--- a/extra/linux/engine/aria2.conf
+++ b/extra/linux/engine/aria2.conf
@@ -106,3 +106,8 @@ seed-ratio=1.0
 bt-seed-unverified=true
 # 保存磁力链接元数据为种子文件(.torrent文件), 默认:false
 bt-save-metadata=false
+# Removes the unselected files when download is completed in BitTorrent.
+# To select files, use --select-file option. If it is not used,
+# all files are assumed to be selected. Please use this option with care
+# because it will actually remove files from your disk. Default: false
+bt-remove-unselected-file=true
diff --git a/extra/win32/engine/aria2.conf b/extra/win32/engine/aria2.conf
index c6f4a37..d5a2f10 100755
--- a/extra/win32/engine/aria2.conf
+++ b/extra/win32/engine/aria2.conf
@@ -106,3 +106,8 @@ seed-ratio=1.0
 bt-seed-unverified=true
 # 保存磁力链接元数据为种子文件(.torrent文件), 默认:false
 bt-save-metadata=false
+# Removes the unselected files when download is completed in BitTorrent.
+# To select files, use --select-file option. If it is not used,
+# all files are assumed to be selected. Please use this option with care
+# because it will actually remove files from your disk. Default: false
+bt-remove-unselected-file=true