QB Issue Resolution:
First thing to do is to be sure to run QuickBooks->Check for Updates and apply any updates. Sometimes the data format changes in a newer update and if you restore you QuickBooks from an older versions you may end up unable to open files.
After updating open QuickBooks. Then try dragging the file you want to open onto the QuickBooks icon in your dock (if you have more than one be sure to pick the one that is running).
Resolution for Issue 'Quickbooks won’t open' available: Yes (Solved).
Source: Intuit Community forum.
Quickbooks won’t open: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.Support for Desktop
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Error Recovery for Desktop [Canada]
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