So, thanks for answers.
I hope I found out the problem. TSVN checks all changes in all windows files (recursively) which deals something which version controlled files(incl. Windows Temp Directrory). May happen that TSVN and LV want to open or change the same file simultaneously and here it crashes. To avoid this, change settings in Tortoise options shown on the picture (so set from "standard" to "shell"). I found it out using Filemon Tool, which shows all events in windows (which file on which time was opened, changes and so on).
Regards, Eugen