Vravani,
I’m guessing from your question and from your other posts that you want to re-install Manager. While I can’t promise anything, I did exactly that tonight (because I really don’t like the Chart of Accounts changes in today’s release and wanted to go back to a prior version for now).
I found that the .manager data files are not backward-compatible from version to version – at least not from v16.1.20 back to v16.1.12, after having created sub-accounts. But luckily I had a backup .manager file from just before I updated from 16.1.12, and I hadn’t made any data entries since then. So I uninstalled Manager from the Windows control panel, then deleted the Manager folders wherever I could find them under my User directory (look in AppData), then reinstalled, then used the Add Business > Import Backup function. Everything, including settings and preferences, seemed to come back for me except for the name of my business, which I just typed back in, and the top-menu privacy preference.
No guarantees, but it worked for me. Good luck!