In Smartcat, you can export a translation memory as a TMX or Excel file, so the file can be imported in another TM, that is, the TMs will be merged. A TM imported in the Excel format can be edited manually via any spreadsheet software at your hand.
By default, you can export the translation memory as a TMX file by selecting it in the translation memory list of your account and pressing the Export button. You should specify the path to a folder where the file will be saved.
Alternatively, you can export a translation memory without tags or in a specific compatibility mode. To do this, select a TM in the list, hit the arrow pointing down on the right side of the Export button, and choose Select export mode.
After that, a window will open where you can select a preferred export option. Then press Export and choose the download path to a folder where the file will be saved.
Please note that some languages might not be compatible with Trados 2007 and that option will not be available.