Attribute Values Export and Import

I can export attribute values to a .txt file (ATTOUT).  I then paste the .txt values into Excel and edit.  Then I want to import the values back into the drawing using ATTIN (at least that was the command in AutoCAD).  I can't find the import command in Draftsight.  The attribute value export works perfectly - including a block handle ID.  What am I missing?  Any suggestions?

HANDLEBLOCKNAMESHTSHTS
6DE7TPG_D1<><>
6EE7TPG_D2225
6EEDTPG_D2325
6EF3TPG_D2425
6EF9TPG_D2525
6F17TPG_D2625
6EFFTPG_D2725
6F05TPG_D2825
6F0BTPG_D2925
6F11TPG_D21025
6F35TPG_D21125
6F2FTPG_D21225
6F29TPG_D21325
6F23TPG_D21425
6F1DTPG_D21525
6F53TPG_D21625
6F4DTPG_D21725
6F47TPG_D21825
6F41TPG_D21925
6F3BTPG_D22025
6F71TPG_D22125
6F6BTPG_D22225
6F65TPG_D22325
6F5FTPG_D22425
6F59TPG_D22525​​​​​​​