Welcome! Sorry for your troubles [:s]
Every time I start or restart my MacPro... the Logos program wants to sync...it runs in the top tool bar but never finishes sync. This happens with or without Logos 6 open or just opened and now closed...I have to pause it for 4 hours if I do not want to tie up cpu usage... any help??
For us to know fully what is going on, we would likely need a screenshot and logs (see links in my signature line)
For clarification: it doesn't sound like you are talking about syncing, but rather indexing. I had this happen to me recently... My index had become corrupted and it had to rebuild the ENTIRE index.