Switching between task options available using menubar:

When generating files user prompt for input of file and line count aswell as folder where to save generated files

If there are other files in folder user would have another prompt

At center of application is Log screen displaying information and progress for certain tasks

When merging files user is able to put filter of which lines exclude.
WARNING This purges original files (supposedly for as task 1.2 states)

Filter is dynamically expandable

After pressing Purge and Merge select files you wish to perform purge and future merge on

Then select save filename

Purge progress:

Purge finish and merge start progress:

User prompted for Purge and Merge before inserting to sql

Select files to insert rows from (as task states from files)
It will then merge it into temporary file from which import will be performed
WARNING All rows that cannot be parsed will be ignored

Insertion progress

Smaller example of how progress goes

Counts Median of Double values and Sum of Decimal rows that are already inserted in db

Task 2 options:

Select file to parse into sql querries and insert them into db

File uploaded popup

Show uploaded files in below maneur:
BankName - - - - - Date

Selecting file will display its content