I've the same problem. Very high CPU usage on Windows 7 and Resilio Sync 2.4.4 (732). One CPU (of a multi-core machine is almost permanently blocked by Resilio.
The high CPU usage occurs even if the web front end says that there is no indexing.
Additional information:
* no antivirus software is installed/ activated.
* All windows updates are installed.
* 9 Resilio-Sync Folders with in total 230 Gb data (about 330.000 files)
* no encrypted folders/ no other encryption from third parties (e.g. from windows) is used
* all sync-folder are 1.4 standard folders