You can access the most recent copy of TMSEEG toolbox on GitHub:
https://github.com/EEGSignalProcessing/TMSEEG/releases/tag/v5.0
If you use this toolbox or a variation of it in your work, please acknowledge its usage by citing the following publication:
Atluri S, Frehlich M, Mei Y, Garcia Dominguez L, Rogasch NC, Wong W, Daskalakis ZJ and Farzan F (2016). TMSEEG: A MATLAB-Based Graphical User Interface for Processing Electrophysiological Signals during Transcranial Magnetic Stimulation. Front. Neural Circuits 10:78. doi: 10.3389/
*** NEW ***
EEGDataPro Toolbox
EGGDataPro is a new toolbox that allows you to build your pre-processing routine for TMSEEG, ERPEEG and resting-state EEG studies.
You can access the most recent copy of EEGDataPro toolbox on GitHub:
https://github.com/EEGSignalProcessing/EEGDataPro/releases/tag/v3.0