Extention rename

Hello, i tried to use this software for renaming GOPRO Low Definition Files

look like this:

GL014520.LRV

I want to convert to

GX014520.MP4

For the L to the X no problem, the batch works...

but, no way for the extension... i check "apply to extention" combobox , but .LRV stay on modified file...

the file is now named GX014520.LRV

Can you help me?
Reply to #1:
Hi marc.
I think that you can do this with 2 REPLACE methods,

Method 1:
Text to replace: L
Replace with: X
Apply to: Name

Method 2:
Text to replace: LRV
Replace with: MP4
Apply to: Extension

You can also rename it with a single method using Regex:
Text to replace: (?:L)(\d.+)(\.[^.].+)$
Replace with: X$1.MP4
Use regular exresion: Yes
Apply: Name and extension


Miguel