I have the exact same problem!
I got on live chat to Enzo about it - he said just add it to my ignore list.
But I didn't fancy doing that - so I deleted it.
However, now I can't start 3Dice!
This must be a recent change they did; it's my laptop where it wont work and I only downloaded a few days ago.
On my PC, where I downloaded years ago, it works fine.
Purveyors of legitimate software should make more effort to ensure their product does not trigger alarms with mainstream anti-virus products. While 3Dice might be trusted, it is always possible that some malicious hacker hacked their site, or even built a dummy version and used phishing, and tellimg players to simply ignore such alarms because they are bound to be false ends up making things easier for the malware producers and distributers.
The cause may be the somewhat illogical insistence of foisting these "download managers" on us, rather than letting us use our native browser and/or OS functionality to download the entire installer. With each supplier having their own, often different, bespoke download managers, user's PC's can get bogged down with several of these applications. Some trigger virus alerts, but the others can simply produce instabilities in the OS, resulting in those rather curious errors that players post about - such as being unable to open the RTG cashier, when 99% of the rest of us have no such problems.
The screenshot in this case seems to be one where access to the internet is being requested, but the 3Dice download manager having been mistaken for this trojan. These small casino download managers are executable files whose function is to connect to the internet and download the "big" program, and then execute it to install the casino. It is this "phone home" aspect of these applications that triggers anti-virus and firewall software to consider the program a potential threat if it resembles any of the malicious code fragments from it's detection database.
If the casino is a trusted one, and you are SURE it came from the genuine website, i.e, you didn't find it through a link in a spammy email, it should be OK to "grant access" in these cases.