Testing on a test machine. I removed the previous alpha-1 version. Installed 64-bit Alpha-2 clean. Program came up and started ok. Imported songs from 2.4.6 data file which imported a large number of duplicates. Tried Tools>Songs>Find Duplicate Songs. This cranked for a while, the threw a popup "Failed to execute script __main__". The program continued to run after OK, throwing more of the same error every few seconds but the OpenLP main process window showed "Not Responding". Finally killed from Task Manager. 0-length error.log in C:\users\alsor\AppData\Roaming\openlp. No OpenLP Debug entry in Programs - filing separate bug for that.