You will find an answer to many of your questions in the Q&A section of the Support Forum.
Visit the Tekla BIMsight Help Center or use the Search function to find what you are looking for.
If you have problems accessing the site content, send us feedback by filling in this form
To open a project package or a model file:
If you want to open any file type supported by Tekla BIMsight, select All supported file types.
If you want to open a project package, select TBP files.
You can also open project packages and model files by dragging the files to Tekla BIMsight or by double-clicking the files.