cdnbones: I have submitted TI.EXE to symantec as it keeps being identified as a heuristic threat 170.
Really wish this was done by the people releasing the game instead of the end users
The same happened to me with Avast except the threat was IDP.Generic. The thing was Avast scanned it and declared it OK but when TI.exe was run Avast quarantined it. I reported it to Avast as a false positive so hopefully they'll soon fix it. In the meantime I also checked the file with Malwarebytes and online at VirusTotal and Kaspersky and they all reported no problems so I've added it to my Avast ignore list and I'm good to go.
Unfortunately, I'm not sure if this can be caught by GOG as it seems very random what with different virus threats being recorded, etc. and not everyone having this problem. Hopefully though it will be sorted soon by Avast and Symantec.
EDIT: Just had confirmation back from Avast to say that it is a false positive and they have now cleared its reputation in their database.