Could not start chrome on Windows

[knallcharge]

On Windows I get the error message "Symfony\Component\Panther\Exception\RuntimeException: Could not start chrome. Exit code: 1 (General error). Error output: The command "." is either misspelled or could not be found."
To fix the issue on Windows I changed the hardcoded path "./drivers" in ChromeManager::findChromeDriverBinary (line 89 in version 2.2.0) to ".\drivers".

Searching for the issue I found that in some older versions of Panther it was possible to create a ChromeClient directly, telling it the drivers-path as a parameter, but this seems to be removed and I couldn't find a way to do it with the current version.
(Using Client::createChromeClient() with the binary-path does not work either, it throws a "Facebook\WebDriver\Exception", also setting PANTHER_CHROME_BINARY to my path did not change anything.)

Question: Am I missing something or can I still set a custom drivers-path somehow? Or should the hardcoded path in ChromeManager use the DIRECTORY_SEPARATOR instead of a slash?