You can save your customizations to routing profiles directly in your browser and also load them from there. No longer needed custom profiles can also be deleted.
These customizations are only visible for you and in the currently used browser and not for other users.
If you want to use your custom profiles on other devices, you should save them on your computer. This way you also have a backup in case you reset your browser.
To transfer custom profiles to another computer, use the settings export feature to download all important Bikerouter settings, including your custom profiles. On the new computer, import the downloaded file using the import settings feature. Export and import buttons are located in the main dropdown menu.