Thank you for writing.
I am not sure if I completely understand your scenario, but generally, it would not be possible to restore the location only of a specific tool windows because it depends on the positions of the other docked windows which you are creating dynamically.
However, in case the tool window whose location you want to persist is a floating one, you can persist its location in the application settings file Properties\Settings.settings. I have prepared a small sample project which demonstrates this and I am attaching it to this post. Please refer to it for additional details.
I hope this will help you. Please let me know if there are some details around your requirements which I am missing. This might help me find a solution for your case. Also, feel free to ask if you have any additional questions.
A bit off topic, I would like to remind you that if you would like to continue receiving support services from us, you should consider renewing your license. Please, contact firstname.lastname@example.org
or visit your account page for upgrade options.
the Telerik team