Adagio Ledger 90A is installed to a \softrak\ledger directory, no longer \softrak\alwin as was the case in earlier versions of Adagio Ledger. Make sure your shortcut is pointing to the \softrak\ledger\ledger.exe application. If this is /ASP/data, then that will not have changed.

The location of your data files will not change, but they will get converted. Ensure you you a backup of your data first - this is part of the conversion process.