Product Support Download the Latest Updates Download the latest versions of Quantum XL, SPC XL, DOE Pro XL, SnapSheets XL, SimWare, and Pro-Test. Frequently Asked Questions Browse our frequently asked questions. Installation Instructions Find solutions to installation issues. For technical support, please email support@sigmazone.com. Please include the following…The name of the product (Quantum XL, SPC XL, DOE Pro XL, SimWare Pro, Pro-Test, SnapSheets XL). Your name and serial number (CD Key). A description of the problem.If applicable, please attach an Excel Workbook that includes the data set and analysis that you are having problems with. Common Knowledge Base Articles Automatically Start Quantum XL when Excel Starts Automatically Start SPC XL when Excel Starts How to determine if your Excel is 32bit or 64bit? Download the Quantum XL Installer which Forces 64bit Install How do I find my Serial Number/CD Key for the Software I Purchased? How to Start SigmaZone's Excel Add-Ins (Quantum XL, SPC XL, DOE Pro XL, and/or Snapsheets XL) How to Use a Coupon Code to Purchase Quantum XL DOE Pro Stops Unexpectedly Repair, Remove, and Reinstall Office