Some of the new versions of MakerBot Desktop occasionally alter the functionality of the software for some users.
Here are some links to version 3.4 for any users who are looking to roll back their software a few versions:
Windows 64 Bit : http://s3.amazonaws.com/downloads-makerbot-com/makerware/MakerBot_Bundle_BETA_3.4.1.48_x64_Install.exe
Windows 32 Bit : http://s3.amazonaws.com/downloads-makerbot-com/makerware/MakerBot_Bundle_BETA_3.4.1.40_x86_Install.exe
Windows 8.1 64 Bit : http://s3.amazonaws.com/downloads-makerbot-com/makerware/MakerBot_Bundle_BETA_3.4.1.124_8.1_x64_Install.exe
Windows 8.1 32 Bit : http://s3.amazonaws.com/downloads-makerbot-com/makerware/MakerBot_Bundle_BETA_3.4.1.94_8.1_x86_Install.exe
Mac : http://s3.amazonaws.com/downloads-makerbot-com/makerware/MakerBot Bundle BETA 3.4.1.48.dmg