html[date=2025-09-03 timezone=“America/Chicago”]
Most “don’t start” threads here were seemingly solved by “tried again and now it works”. So that would be my suggestion.
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Some hints: A download without attempt to install should not change anything on your (unknown) OS. So either you omitted detail or you have severe problems outside LibreOffice. In the latter case I recommend a check of your hardware/OS etc.
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I will change your tag, as “Base” is the Database-component of LibreOffice, seems unrelated.
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Without even naming your OS, please don’t expect much help here…