.2011 File

The 2011 file extension might be used for any data file created in year 2018, typically as some kind of backup to distinguish the data from previous years.

Such files are most frequently used by various tax preparation software, but might as well contain calendar, business or just be backup of some sort.

This 2011 file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

How to open:

Likely can be only opened or accessed in program that created the *.2011 file in first place.

How to convert:

Sometimes export or conversion of *.2011 files is possible, but no general info about 2011 conversion is available at this time.