Here is a private test build 1.9.0.553:
http://www.macecraft.com/downloads/betas/jv16pt_setup_553.exe
This test build attempts to fix the following issues:
1. Compatibility issues between PowerTools and 64 bit Windows
2. Program hanging to screen refresh/flicker loop under some system.
Please only download this version for testing purposes, the official new version will be released later in this month. This version is not yet ready for prime time.
Please report any comments, feedback and bug reports relating to build 553 to this thread. Thank you!