My V18 works without problem.
Ditto.
If you can't get BL working, then try:
1) Restart BL. If this doesn't work, try restarting your computer.
2) Checking for a possible virus
3) Un-and-Re-installing BL, making sure that you have the proper version designed for your computer. Keeping your add-ons is not recommended.
Number 3 worked for me when my IRC notifier was crashing BL after I changed my name. After the re-install, it worked perfectly.