If you only use the Toolkit with a single device and want to skip the device selection screen every time you start the Toolkit well thats easy to do:
1. You have to have selected your required device at least once (so it is set as the last used device).
2. In the Main Menu (after you have selected your working build and downloaded required files) go to the Toolkit Settings screen (option 28).
3a. Select option3 then option1 to skip device selection at startup and always start in last used device module (build selection screen).
3b. Select option4 to skip build selection when device module starts. Toolkit will start, set the last build selected as the working build, check required files are present (and download new superuser, recovery files on pro version) and go to Main Menu. No user input required. NOTE: Make sure the working build that was last used is the one you need for your device.
3c. Select option 5 and you can choose whether to check for an update at startup, check and autoupdate (if available) without asking which is great for Pro users or skip the Update check at startup.
If you choose to bypass the startup options but then need to change the working device or build you can do this from the Toolkit Settings screen (option1 or option2) which will then be applied when you next start the Toolkit.
The above options can be used individually or all together to improve your experience using the Toolkit.