download new update this morning, now I can't open anything

what do I have to do to open my documents

Try to start in LibreOffice Safe Mode and if you want to know how this can be done exactly, let us know your operating system. If you can start in Safe Mode successfully, reset your LibreOffice user profile.

windows 10 & I use Chrome.
Should I uninstall the new update & then reinstall

No, don’t uninstall until it is not clear whether your user profile is causing the problem - to determine try to start in Safe Mode using the following procedure:

  • Right click -> Run on Windows Start menu (or Windows Key + R)
  • Type "%ProgramFiles%\LibreOffice\program\soffice" --safe-mode into Open text field (including the double quotes)
  • Click OK
  • Click button Continue in Safe Mode

Does it start this way? If yes (and only if yes) - perform the following:

  • Right click -> Run on Windows Start menu (or Windows Key + R)
  • Type "%ProgramFiles%\LibreOffice\program\soffice" --safe-mode into Open text field (including the double quotes)
  • Archive your profile expanding Advanced (click on the word Advanced right above Help button) and click Archive User Profile button
  • Select option Reset to factory settings
  • Activate [x] Reset entire user profile
  • Click button Apply Changes and Restart

There is no “ransomware protection” section on my “Virus and Threat protection” page.

didn’t work, what else do you suggest

This isn’t an answer. Please click on the more icon at the bottom and click Repost as comment. Cheers, Al

I assume that you installed the new version of LibreOffice OK. Could be anti-virus blocking the new version of LibreOffice.

Allow LibreOffice access to controlled folder

The below numbered list is from Use the Windows Defender Security app to allow specific apps

  1. Open the Windows Security by
    selecting the shield icon in the
    task bar or searching the start menu
    for Defender.
  2. Select the Virus & threat
    protection
    tile (or the shield
    icon on the left menu bar) and then
    select Ransomware protection.
  3. Under the Controlled folder
    access
    section, select Allow an
    app through Controlled folder
    access
  4. Select Add an allowed app and
    follow the prompts to add apps. You
    need to allow access to
    soffice.bin

3rd Party Anti-virus

If you do have a third party anti-virus go into settings and then look for something like anti-ransomware or folder protection. Have a look at the blocked apps list, if you see soffice.bin in there change it to Allowed (you might have to read AV help if not obvious). Otherwise go to the Allowed Apps setting and allow soffice.bin, this might not be easy so you might have to add the different LibreOffice executables (Calc, Writer, etc.) to the Allowed list. Note that 3rd party anti-virus might make files Read Only so you can create a new file but you can’t save it subsequently. Sometimes, you might need to reboot after allowing a program access.

Cheers, Al

2020-12-24 If you are on Windows 10 it, might be in the process of updating to version 20H2. Don’t try to install anything until update is complete and you have restarted and have reconfigured and restarted again.