MuRenameTool: Remove varying number of trailing characters

[spikey]

I would like to remove the trailing characters Tumblr attaches to its file names. For example Tumbler uses:

xxxxx_400
xxxxx_500
xxxxx_1000
xxxxx_1280

I would like to remove everything after (and including) the underscore shown above.

I thought about TC's "Search and Replace" using a search string of "_????"

Unfortunately I can't restrict the search to only the file name. This means that the fourth "?" gets applied to the extension which is not what I want. Can anyone kindly suggest how to do this.

[Hacker]

spikey,
Try unchecking [E].

HTH
Roman

[MVV]

spikey,
Also I would use regex _\d+$ instead of just mask to allow only numeric matches at the end of names.