I installed this app over a year ago. I don't remember having any issue when I installed the app. However, I'm using Windows. I'm wondering though, is this a security block you cannot bypass, or are you offered the option of installing the app despite the security warning? If it's just a warning, then it seems you have to decide on whether or not you're going to trust the app based on the fact that it's coming from the Autodesk App Store.
In the case where you are being blocked from installing the app, did you try searching to see it there's a way to circumvent the "unidentified developer" security measure that your OS is throwing at you? If there is a way of doing that, then you're back to the question of trusting the app. The Autodesk App Store FAQ page makes no specific mention of security or safety issues, but it does say this:
"Does Autodesk guarantee Apps offered on Autodesk App Store?
While Autodesk App Store team tests every submitted app before publishing it to the store, we cannot guarantee that every app will function error free in all circumstances. Please contact the publisher for an app if you would like more information on their development and testing procedures, or what data the app may manipulate on your computer. For more information please refer to Autodesk App Store Terms of Use."
The one think I can tell you about this app is that it's worked perfectly for me. It's a big time saver for sure, and after a year I've had no negative issues with it.