When using SetTitleMatchMode, RegEx with a WinTitle containing ahk_exe, the ahk_exe parameter is compared to the process's full path. To specify the start of a process name, precede the leading characters with \\, which denotes a single backslash.
Although this information is provided in the description of WinTitle, I recommend that this information also be included or referenced from the documentation page for SetTitleMatchMode.
RegEx title match mode matches full process path for ahk_exe
Re: RegEx title match mode matches full process path for ahk_exe
Thx for this information. This is really good to know!