After opening a project, Citavi reports that the project is read-only

Problem

After opening Citavi you receive a message that the project is read-only.

Causes and solutions

You are trying to open a project with more than 100 references, but you are using Citavi Free.

Enter your license key for Citavi for Windows.

The Citavi project has the "read-only" file property.

In Windows Explorer, right-click the Citavi project file and then click Properties. Click General and then clear the Read-only checkbox.

The Citavi project is read-only because it was directly opened from a ZIP file.

Extract the project by right-clicking the ZIP file and clicking Extract all. Open the extracted project file.

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