Hi,
Well, it probably is possible.
Check the table hikashop_price in your database via your PHPMyAdmin.
There, you should see what you have under the price_access column.
If many prices have the same text in that price_access column, then you can update them all by running a MySQL query in your PHPMyAdmin.
For example, if you have 11,5 instead of ,11,5, in many of your products, you can run this MySQL query:
UPDATE #__hikashop_price SET price_access = ',11,5,' WHERE price_access = '11,5';
Note that you need to replace #__ by the prefix of your tables.
That will fix for access level on the prices of all these products.