To check which version of the Tridify BIM Tools is in your Unity project, go to Unity Menu: Tools > Tridify > About Tridify BIM Tools. The version number should be the same as in https://www.tridify.com/developer-tools/unity/
Editor versions 2021.1 and above:
You can update the Tools in Unity Package Manager. Unity's instructions for updating packages:
Older versions of Unity:
If Unity tries to import an old version of the BIM Tools from the Asset Store into your project, go to
Windows: C:\Users\[UserName]\AppData\Roaming\Unity\Asset Store-5.x\
Mac: /Users/[UserName]/Library/Unity/Asset Store-5.x/
and delete the old version of the Tridify BIM Tools from the folder and your project before importing the new version.