Help CenterNo there is not with a one click solution.
What you could do is this.
Make sure your project is saved and click "Projects" from the drop down menu in the Studio, then click the "Clone Project". It will ask for a project name give it one. Next, It will ask if you want to open it, say yes. Give it a minute to finish loading all the pages.
If you just wanted to use all or many things in this project, then you are finished.
If you want to continue on splitting the file see below.
Delete the pages you did not want in this one, for example, you only wanted page 51 to 100 in this one. Well then you delete page 1 to 50. Do so by holding down the space button, and click on each page in the page view on the left. You will see each page will be surrounded in blue. Once done, right click and pick "Delete Pages".
Go back to your original file now and do the same as above, but in the example used above, you would delete page 51 to 100 using the same step as above.