Selenium Download Keep and Discard Problem cer or xml extensions

Question

I am working with Selenium and javaJava.ı have a problem with downloading something from the software I am working on. Chrome asks me the security question in order to download (Keep or Discard) So I did try a few methods to get rid of this problem in chrome but I couldn't find a solution and this is important for me to continue to develop automation, that's why I wanted to ask if You know a solution to this issue. I download the XML file or cer file, I get a 'This type of file can harm your computer' pop up. I want to disable this pop up using selenium chromedriver and I want these types of files to be downloaded always. How can this be done? Chrome version:80.0 Selenium version: 3.8.1 Chromedriver version: 2.42, I found these codes but cap object in DesiredCapabilities doesn't work with Chromedriver anymore;

HashMap<String, Object> chromePrefs = new HashMap<String, Object>();
chromePrefs.put("profile.default_content_settings.popups", 0);
chromePrefs.put("download.default_directory", downloadFilepath);
chromePrefs.put("safebrowsing.enabled", "true"); 
ChromeOptions options = new ChromeOptions();
options.setExperimentalOption("prefs", chromePrefs);
DesiredCapabilities cap = DesiredCapabilities.chrome();
cap.setCapability(CapabilityType.ACCEPT_SSL_CERTS, true);
cap.setCapability(ChromeOptions.CAPABILITY, options);
WebDriver driver = new ChromeDriver(cap); //this driver doesnt work anymore 

Also If I try without Capability object, I get to download cer extension file but I get "Failed -Download Error " failure.If I dont write default directory for the download , then CHROME again ask me the Keep/Discard Security question. I need to solve this problem since without dowloaded object I cant go on the other tests.I hope to get a reply from you. Thank you.