<h1 dir="auto">Environment</h1>
<p dir="auto">Windows 10 - PowerToys 0.18.2</p>
<h1 dir="auto">Steps to reproduce</h1>
<p dir="auto">Select a few files in explorer, and launch PoweerRenamer</p>
<p dir="auto">enter (.*) in the "Search for:" field<br>
enter "$1.txt" in the "Replace with:" field.</p>
<h1 dir="auto">Expected behavior</h1>
<p dir="auto">The new file names should be the original filename plus ".txt"</p>
<h1 dir="auto">Actual behavior</h1>
<p dir="auto">The new filename is "$1.txt" If I click on "Rename", the file is renamed $1.txt</p>
<p dir="auto">I've also tried with "\1.txt" instead of "$1.txt"</p>
<h1 dir="auto">Screenshots</h1>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/8438590/83965223-f0bbcb80-a8a9-11ea-9af9-d9b6a9d8098c.png"><img src="https://user-images.githubusercontent.com/8438590/83965223-f0bbcb80-a8a9-11ea-9af9-d9b6a9d8098c.png" alt="image" style="max-width: 100%;"></a></p>
<p dir="auto">due to <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="540249146" data-permission-text="Title is private" data-url="https://github.com/microsoft/PowerToys/issues/980" data-hovercard-type="issue" data-hovercard-url="/microsoft/PowerToys/issues/980/hovercard" href="https://github.com/microsoft/PowerToys/issues/980">#980</a> and <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="534045104" data-permission-text="Title is private" data-url="https://github.com/microsoft/PowerToys/issues/881" data-hovercard-type="issue" data-hovercard-url="/microsoft/PowerToys/issues/881/hovercard" href="https://github.com/microsoft/PowerToys/issues/881">#881</a>, it may be helpful to inform user that they may need to enable 'match all' if we detect pattern matching like $1, $2 in the replace text box</p>