How to clear the naming history of captured screenshots

Question

Scenario
There is a new method to take a screenshot and save it as a file in Windows 8 and Windows 8.1: Go to the windows which you want to capture, press
Windows logo key+PrtScn, then the full Desktop content is captured and saved as .png file to the folder
Screenshots in Pictures library. When you create several screenshots using this method, the files are automatically numbered consecutively, which is as shown below:
However, if the existing pictures are removed, the next screenshot would be still numbered following the previous screenshots, not starting over. For example, deleting the files Screenshot (1), Screenshot (2) and Screenshot (3), the next Screenshot would
be still named as Screenshot (4), which is as shown below:  
Solution
To resolve this problem, you can use the method below:
Press Windows logo key +R to open Run, type
regedit, and then press Enter to open Registry Editor.
Navigate to the key: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
On the right side, change the value of the DWORD ScreenshotIndex
to 0.
 Exit Registry Editor.
Take a capture again to check if this problem was resolved.
Note:
Please click Yes in the User Account Control prompt to continue.
Before making changes to a registry key or subkey, we recommend that you export, or make a backup copy, of the key or subkey.
If only deleting part of the screenshots, please refer to the following two scenarios (still using the above example)
Only deleting Screenshot (1), the next capture would be named as Screenshot (1), and the following ones would be named as Screenshot (4), Screenshot (5) and so on.
Only deleting Screenshot (2), the next capture would be named as Screenshot (2), and the following ones would be named as Screenshot (4), Screenshot (5) and so on.
Only deleting Screenshot (3), the next capture would be named as Screenshot (3), and the following ones would be named as Screenshot (4), Screenshot (5) and so on.
In a word, old images would not be overwritten or deleted anytime.
Applies to
Windows 8
Windows 8.1
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Answer 1

I need to clear the history of uiwebview,
In order to reuse the instance.
... But gave up to do that.
Anyway thanks!