Since you already have QuickBooks Desktop (QBDT), you can manually import your data to Quicken using Excel, stromm. Allow me to walk you through the process.

Start by exporting your Chart of Accounts (COA) and Vendor List. To export to IIF, here's how:

1. Select Utilities, Export, and then Lists to IIF Files from the File menu.
2. Mark Chart of Accounts and Vendor List, then select OK.
3. On the Export window from the Save in drop-down, choose the location where you want to save the IIF file (often, this will be your Desktop).
4. In the File name field, delete the asterisk (*), then enter a file name.
5. Select Save, then OK.

Afterward, export to Excel. 

1. Select Vendor Center from the Vendors menu,
2. From the Excel drop-down, choose Export Vendor List.
3. On the Export window, select Create new worksheet: in a new workbook, then choose Export.
4. Save the Excel sheet.

Once you're done, export your information from Quicken into a .QIF format. For Quicken Home & Business, you can export/import the address book from Quicken in the .QIF format. For the step-by-step guide, please see this article: Convert from QuickBooks Desktop to Quicken.

Moreover, in case you need further assistance importing your QuickBooks data to Quicken, I'd recommend contacting their support directly.

Additionally, would you like to create a backup of your company file in QBDT for future data restoration purposes? You can check out this article to guide you through the steps: Back up your QuickBooks Desktop company file.

I'm always here ready to lend a hand if you have other concerns managing your QuickBooks data. Please don't hesitate to leave a reply below. Have a good one.