It depends of your previous version of TIC
if it was usual Windows application then try to search here:
C:\Users\%USERNAME%\AppData\Roaming\TIC - tiny computer
if it was Windows 10 UWP application from the Store then something like here:
C:\Users\%USERNAME%\AppData\Local\Packages\50446Nesbox.TICcomputer_8y3dwps6jawp4\LocalState\TIC - tiny computer