When you first run PurchaseManager, it will ask if you wish to import products and suppliers from other applications, you can either import then or at any time you wish. Simply export the data from your other applications as a comma separated value (.CSV) file; you can then import into PurchaseManager.
We recommend you first import your suppliers' details,... their company name, address and contact details. You can then import products (names, descriptions, price, supplier) with a supplier field attached to each one. If the supplier name matches exactly a supplier already in the database, then the program will allocate the products to that supplier, if not then it will create a new suppier.