Regex back references

When use Intellij to search/replace by using Regex, you need to notice that the back reference is $n rather than \n.
Refer to Intellij Help on search/repalce.
Refer to here.

Replace File Explorer with XPlorer 2

Need a tabbed file explorer?
Try Xplorer 2 out.
Please refer to here.
Aslo: need tabbed console? here you are.