Customize System Tray Icon Images

I would like to find out how I can customize the actual images(icons) displayed in the system tray.

This is my current system tray -->

Icons I want to change include BitDefender, Chrome, and OpenVPN to make them better fit the new Windows 10 icon theme. The white icon in the top right corner is one that I was successfully able to change. The program is Vuze Bittorrent client --> The Vuse wiki actually tells the location of the .png image file --> https://wiki.vuze.com/w/Change_Notification_Area_Icon

For BitDefener, I found the folder where the .png files are located and I was able to overwrite them to white icons that would match my Windows 10 theme.
C:\Program Files\Bitdefender\Bitdefender 2015\support\offlinemanual\images\icons


However, the icon in the system tray stays the same (ugly red B). I am sure there is something else I need to do seeing as BitDefender is a security application in which I am sure makes it hard to tamper with it's files.

Does anyone have any advice on how I can change these icon images? or know of a tool that allows you to change the program's system tray image?

Thanks in advance.
Stephen

Id also like to know how to change my system tray icons. I remember I was able to do this in Win7 but I cant seem to in Win10. I can change the icons of things in the task bar but not the system tray. My reason for doing so is one of the programs I used updated their icon and I keep forgetting what it is, and Id like to be able to change it back to the old icon so I can easily find it like I used to. Help on this would be appreciated

I'm going to go ahead and chime in, here. Also would like to be able to customize these elements. I'm 100% comfortable with tweaking a png or jpg image down to appropriate size and converting to .ico file if that's what's needed, but for the life of me I can't figure out where to input such a thing.