Not Responding/Crashing

Hello 

I'm a New user to your program AECOSim SS5 V8i as my experience was only on Revit (I'm BIM/COBie Specialist Engineer) , but my company is forcing me to use it coz the whole Arch. and Structural model from the designers were designed using this program

Despite that its a non user friendly interface (no offense ) , but since i started operating on it , it crashes a lot 

when i try to modify elements it works, but some other times it just lags and give me the (Not Responding) term in the top of the screen and it hold still like this for ages 

this thing happens when i just try to modify elements and add instance data in order to be able to export the IFC and COBie spreadsheet 

anyone knows what shall i do ?