Referencing Previous Version of File using Filename - excel

Question

I am saving workbooks with v[ ] next to them to differentiate between latest and earlier versions.
Workbook v1
Workbook v2
...
Workbook v365
Is there a way to create a dynamic formula that does the following:
Detects the current version (365)
References a specific cell (e.g. A2) in the previous version (Workbook v364)
Please let me know! Any help would be really appreciated.

Answer 1

Since you did not answer my clarification questions, the next code will assume that the current workbook is the active one, all versions exist in the same folder and the "reference cell" will be a range in the previous version workbook where from a value must be extracted and it will be found in a sheet named as the active one in the current workbook:
Sub referenceThePrevVersion()
Dim wb As Workbook, curVers As Long, curName As String
Dim prevVersName As String, refVal As Variant, arrCur
Const refCell As String = "A2"
Set wb = ActiveWorkbook 'it my be ThisWorkbook if you need this one where the code exists
curName = wb.name 'the current workbook name
arrCur = Split(curName) 'split its name by spaces and place the words in an array
curVers = CLng(Mid(Split(arrCur(UBound(arrCur)), ".")(0), 2)) 'extract the current version
prevVersName = VBA.replace(curName, "v" & curVers, "v" & curVers - 1) 'obtain the prev version decreasing a unit
'extract the value of refCell, without opening the previous workbook:
refVal = CellV(wb.Path & "\", prevVersName, wb.ActiveSheet.name, Range(refCell).address(, , xlR1C1))
MsgBox refVal 'show the extracted value...
End Sub
Private Function CellV(fpath As String, fName As String, SheetName As String, strRange As String) As Variant
Dim strForm As String
strForm = "'" & fpath & "[" & fName & "]" & SheetName & "'!" & strRange
CellV = Application.ExecuteExcel4Macro(strForm)
End Function
The extracted value is CellV. It now is shown in a message, you may use it as you need.
Of course, if you know the previous version name and its path, you can open it and do whatever you need with its data.
Please, send some feedback after testing the code. If something not clear enough, do not hesitate to ask for clarifications.