The best place to select, view, print, or export any order is from the Orders page of your Shopify admin. There you can use Shopify's built in filtering and selection process to find any order in your store, including old orders.
1- From your Shopify Admin, go to the Orders page
2- Find and select the order(s) you want to print or export
3- In the pop-up actions bar, click on the three dots, and then select 'Print with Order Printer Pro' or 'Export PDF with Order Printer Pro' if you plan to export it.
As long as the orders are still available in your Shopify admin's Order section, you can print or export them using the Order Printer Pro app.
Note: You can select and print a maximum of 50 orders at a time. The 50-order limit is something that Shopify controls, and apps cannot change that limit, unfortunately.