i cannot open data files

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Hi all, I just finished installing sage 50 acctg. 2020 done and finished,  when I am about to open it, I cannot access data file.  I tried many times to uninstall and install the software hoping that the system will bring me to the welcome page to be able to select opening the data.  Kindly help?  Thank you.  I just found out that I am missing the SageData20 folder