To save your products and prices in MyInvoices & Estimates Deluxe, you may need to check if all required fields are filled out before the SAVE button becomes active. Make sure you have entered all necessary information for each product, such as name, description, price, etc. If the SAVE button is still grayed out, try restarting the program or checking for any updates that may address this issue. Additionally, ensure that you are using the correct version of the software for Windows. If the problem persists, you may need to contact customer support for further assistance.