File list (Check if you may need any files):
Billing System
Billing System\.vs
Billing System\.vs\Billing System
Billing System\.vs\Billing System\v15
Billing System\.vs\Billing System\v15\.suo
Billing System\.vs\ProjectSettings.json
Billing System\.vs\slnx.sqlite
Billing System\.vs\VSWorkspaceState.json
Billing System\Backup.txt
Billing System\Backups
Billing System\Billing Summary Default.rtf
Billing System\BillingSystem.vbp
Billing System\BillingSystem.vbw
Billing System\Charges For.txt
Billing System\Color Logo.bmp
Billing System\DB
Billing System\DB\AIW-Recordset.mdb
Billing System\DB\AIW.mdb
Billing System\DefaultInvoice.rtf
Billing System\frmBS.frm
Billing System\frmBS.frx
Billing System\frmInvoice.frm
Billing System\frmInvoice.frx
Billing System\frmMain.frm
Billing System\FRMMAIN.frx
Billing System\frmPaying.frm
Billing System\Module1.bas
Billing System\MSSCCPRJ.SCC