Hi,
I solved my problem after looking at log line complaining about missing path:
C:\ProgramData\VMware\VMware Update Manager\Data\host_upgrade_packages\esxi-upgrade-woosktebvs
I created this path and copied content of existing
C:\ProgramData\VMware\VMware Update Manager\Data\host_upgrade_packages\esxi-upgrade-bbylallekd
to it (there were new files with date 2014/09/09)
VUM scan and remediate works for me now without VUM service crash.
HTH
Richard