All R-Studio versions (except the technician version*) are registered on on-the-fly and no reinstallation required.
Depending on the registration key the software is activated to local or network version. When R-Studio run in the demo mode has found a lost file larger than 256KB you may simply double click the file to preview it.
If you are satisfied with the file content you may buy the R-Studio license, register the software and recover the file right away.
Besides compatibility with all 32-bit Windows R-Studio supports 64-bit Windows and allows to use all physical memory (RAM) installed on such computers that highly increases a scan performance especially on high-capacity disks.