Under C:/Users/Lorren/AppData/Roaming/Starcoin there are two files called blk001.dat and blkindex.dat. I renamed those files so they had a .bak extension (just in case), closed starcoin-qt, and then I replaced the two files with the dropbox files. When I restarted starcoin-qt it was synced.
i just had to wait a few minutes and now my wallet is synced. thanks for help anyway.