в таких случаях нало включать лог загрузки и смотреть на что больше всего уходит времени.

OK - [362458 ms]
Загрузка параметров...
OK - [1 ms]
Application.Initialize...
Splash form...
OK - [15 ms]
File Manager Create...
OK - [3 ms]
Icon Manager create...
OK - [5270 ms]
WMP create...
Load icons...
OK - [5 ms]
OK - [0 ms]
Load langs...
OK - [1 ms]
Bottom Tabs create...
OK - [3 ms]
Program Manager create...
OK - [1 ms]
Navigate...
OK - [314 ms]
Project tree...
OK - [2 ms]
Top Panel create...
OK - [2 ms]
Check integration...
OK - [1 ms]
Load Panel settings...
OK - [242 ms]
Plug Manager create...
OK - [7 ms]
Load SHA from params...
OK - [54 ms]