We use TortoiseGit for version control. Due to some conflicts, we reverted to the previous stage. Later while trying to check-in the files, I see a message in Git $rhvariable$.htm and <file_name>.ldb files as missing.
I haven't opened the project yet. I want to know the behavior or how does it impact the check-in?
The CPD file in your project is an Access database with a different extension. Like all Access databases it creates an LDB file when opened to lock it. It gets deleted when a project is closed, usually. It is not a file that should be checked in, neither should the CPD file.
I think the $ file is a temporary file (perhaps associated with previewing topics?). I should be safe to leave out of source control.