so, whenever I open or close your file, I get lines and lines of errors being corrected - or not. No idea in what software the tiles have been made, but their conversion has been messy to say the least.
selects fine in 31.1 windows, not in mac version. although, selecting from the component panel works.
selecting with the lasso kinda works.
exporting one of the tiles component as a solo files gives this
Group_2523006.skp (130.3 KB)
your times a gigantic. 48m long.