SpiderOak 7.4.0

- Fixed bug causing synchronizations to not work correctly under Windows XP in certain situations
- Re-built the Windows installation file as MSI for greater flexibility and installation user management
- Fixed bug causing recycle bin downloads to fail
- Fixed bug causing custom download locations for file-restores not to work correctly
- Fixed bug causing un-installation to require reboot under Windows

- Fix minor bugs affecting the preview generator
- Fix a bug causing the program to crash when attempting to create a sync with an entire drive in Windows
- Fix bug causing single files selected for backup (ie. not part of a folder which is selected for backup) to not be monitored for immediate changes
- Fix sync bug causing subfolder contents not to be synced in some circumstances

* Do not include ShareRoom password support from previous beta
* Add digital signature to Mac builds

- Sync and LAN Sync reliability improvements