Similar to several other reports, I can’t install the 3.5.1 with an existing install. Installing 3.5.1 from the msi, this fails, and also can’t uninstall 3.4.5. Platform is Windows 7, 64bit. The release notes indicate that an upgrade from 3.4.5 ought actually to work (it says there’s a known problem for <3.4.5), but it does not, for me.
“Please exit LibreOffice 3.4 and the LibreOffice 3.4 Quickstarter before you continue”.
The answers to other questions of this sort say to kill the soffice process and the quickstart process, but neither are running. What else can I try?