I understand you're looking for information about CorelDRAW 13, but I should clarify a few important points first.
If you still require CorelDRAW 13, here is the current status of downloads and updates:
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Outdated Microsoft Visual C++ dependencies can cause random crashes during file exports. How to Run CorelDRAW 13 Safely Today
Here is the version numbering breakdown for CorelDRAW X3: