We assure you that Traffic Travis is completely safe to use. It does not contain any viruses, spyware, malware or Trojans.
For your reference, please refer to this report. This Virustotal URL shows that TTv4 has no viruses/malware.
We also checked all executable files and DLLs. Below is a list of the tests done:
You may opt to report the issue to your antivirus support as a case of "false positive" and add TTv4 to your list of allowed programs.
It's also possible that your ISP incorrectly perceived Traffic Travis's updates or keyword research as an attack. To resolve this problem, increase the timer delay value to at least 6 in File > Program Options > Internet.