|I have been working on an excel file (.xlx)|
A file with the extension of .XLX is an Xcelsius Crystal Reports file,
not an Excel file.
Do you mean an XLS file type?
In any case your question is confusing.
You first say:
always saving the same file
Then you say:
I can only find the most recent version as of a month ago and not the my most recent save last week
If the file has the same name all the time, you can have only one copy of it.
That copy will be the most recent.
Are you saving it to a different location each time you save?
Not sure what your problem is.