To resolve this issue, please go to the temporary folder of user, i.e. C:\Users\Administrator\AppData\Local\Temp\2 and remove the files generated by the installer.
You have a etapassync_install.log file, some two .tmp and one config file.
Close the installer check again if the files are there, if yes, remove them (or move them to another folder)
Try again the insatllation and confirm that installation now will allow accept the license agreement sucessfully.