In the 2015 version unbearably slow

I now have the version 2015 .NET mode, ie where said to have been actually made compared to the previous substantive changes. This version is on the same computer as compared unbearably slow. When changing views of accounts are always a few seconds memorial there. The annoying especially because I know that it goes even faster.
And because of the "very fast times remit what" or "on account look" is a long task.
(Windows 8.1, I guess faster computers overall speed index 7.95, SSD hard drive)

So stay with the old version, as long as the problem is not solved. Is beyond me why so poorly tested software is delivered.

Addendum (8.2.15): The support of Buhl (the manufacturer) does not recommend specifically to the Version 2014. 2015 to use if you want to install it on a computer with "modern" operating system. This refers to Windows. 8