The software is a "shell" that requires access to Magnit’s private corporate servers and databases to function. Downloading a standalone installer would not allow you to use the program.
If you are looking for a program to manage your own warehouse, you might consider commercial alternatives like (МойСклад) or 1C: Warehouse Management , which offer similar features for public use. Warehouse Management and Inventory Software - Vladovsoft tander sklad programma skachat
Some third-party sites claim to offer "Tander Sklad training programs" or tutorials, but these are often unofficial and may contain malware. The software is a "shell" that requires access