Find files starting with a specific characters using regex

Question

I'm trying to exclude files starting with characters ~$ from archiving using the regex.

Example of directory contains files:

• ~$file01.txt
• ~$file02.txt
• file01.txt
• file02.txt

So, I want find all the files in dir that start with "~$", and I've tried the following regex but files are still not excluded

.*/~[^/]*

What's wrong with this?

It is software that archiving files.
I want to exclude from archiving the filenames starting with ~$.
All files will be archived, only files starting with ~$ will not be.
In this software, there is option to add regular expression to exclude files from archiving.
regular-expressions.info link is part of the software documentation, but I don't know how to write the needed regular expression.
Can you help me, please?

Answer 1

Good day, As mentioned in the comments it would've been better if you provided more detail, especially on the exact command you're using to achieve this, however, since it's regex-related I think the following would be helpful:

Consider these syntaxes:

(?=subexp)         look-ahead
(?!subexp)         negative look-ahead
(?<=subexp)        look-behind
(?<!subexp)        negative look-behind

So in your case it'd be:

(?<!~\$).*