Your log files show that your Indexing Process hangs when trying to index an attachment of the Thought 14468.
Please try the following to avoid the problem and complete the Indexing Process:
Starts PersonalBrain and skip the Indexing Process that runs at startup.
Activate the Thought 14468 to view the attachments of it. You can activate this Thought typing in the Search Box of the Plex the number of the Thought, 14468, and pressing Ctrl+Enter after this.
After activating the Thought 14468, please temporary remove the attachments of this Thought to complete the Indexing Process that runs at startup.
Restarts PersonalBrain and continue the Indexing Process that runs at startup. The Indexing Process will be completed because the bad attachments are not present in your Brain.
Please let us know if the previous steps work for you.
Can you send the bad attachments to us? (This will be very useful to exactly reproduce your problem).
Some other useful logs are created during the Indexing Process and also will be useful to see what is happening with your indexing: IndexBuilder.dat, IndexBuilder.log, UrlIndexBuilder.dat, UrlIndexBuilder.log. These log files are located in your _brain folder, please send these files also.