修改使用说明

README.md

@@ -3,14 +3,14 @@
 删除条目或分类的同时将附件也一块删除。
 
 
-从[https://github.com/redleafnew/delitemwithatt/releases](https://github.com/redleafnew/delitemwithatt/releases)下载xpi，然后在Zotero或JurisM中通过Tools-Addons-Install Add-on From File安装。安装完成后在条目上右击会出现：`删除条目包括附件`，确认后会在删除所选条目的同时将附件删除。在分类上右击时会出现：`删除分类条目包括附件`，确认后会在删除分类的同时将分类中的条目包含附件删除。
+从[https://github.com/redleafnew/delitemwithatt/releases](https://github.com/redleafnew/delitemwithatt/releases)下载xpi，然后在Zotero或JurisM中通过Tools-Addons-Install Add-on From File安装。安装完成后在条目上右击会出现：`删除附件`，如果条目有附件，会出现三个子菜单，`删除附件(快照)和条目`，`仅删除附件`，`仅删除快照`，点击后条目包括附件、附件或快照会被删除（包括文件）。在分类上右击时会出现：`删除分类条目包括附件`，确认后会在删除分类的同时将分类中的条目包含附件删除，**注意：删除时文件不进回收站，直接删除，请删除前备份**。
 
 
 # Usage
 
 Remove attachment(s) when delete the item(s) or collection.
 
-Download xpi from [https://github.com/redleafnew/delitemwithatt/releases](https://github.com/redleafnew/delitemwithatt/releases), and click Tools-Addons-Install Add-on From File in Zotero or JurisM to install the extension. After the installation, right click the item(s) `Delete Item(s) with Attachment(s)` shows, when confirm, the item(s) with attachment(s) will be deleted; right click the collection `Delete Collections with Attachments` shows, when confirm, the collection and the item(s) with attachment(s) in the selected collection will be deleted.
+Download xpi from [https://github.com/redleafnew/delitemwithatt/releases](https://github.com/redleafnew/delitemwithatt/releases), and click Tools-Addons-Install Add-on From File in Zotero or JurisM to install the extension. After the installation, right click the item(s) `Delete Attachment(s)` shows, if there is/are attachment(s) for the item(s), there  will be three submenus, `Delete Attachment(s)/Snapshot(s) and Item(s)`, `Delete Attachment(s) Only`, `Delete Snapshot(s) Only`, when confirm, the item(s),attachment(s) or the snapshot(s) will be deleted;  right click the collection `Delete Collections with Attachments` shows, when confirm, the collection and the item(s) with attachment(s) in the selected collection will be deleted. **Note: the files could not be restored, they will be removed directly, please backup before removing**.
 
 # License
 The source code is released under GNU General Public License, version 3.0