If you run ProBoard 2.x (the 16-bit DOS program) you can keep your users, message bases, file areas and menus. Most files carry over exactly as they are. A handful of data files changed shape and are converted for you, after a backup.
These keep their on-disk layout, so v4 reads them as they are: CONFIG.PRO, USERS.BBS and its companion files, MESSAGES.PB, FILECFG.PRO, the message bases (JAM, Squish and Hudson), menus (.PBM) and your text and ANSI screens.
Seven data files used 16-bit field sizes and need converting to the v4 sizes. The conversion is done by the same engine whether you start it from PBInstall or from PBConfig.
| File | Holds |
|---|---|
LIMITS.PRO | Time and download limits by security level. |
AKA.PRO | Your FidoNet addresses. |
PROTOCOL.PRO | Transfer protocol definitions. |
Template.Pb | New-user templates. |
EVENTS.PRO | Scheduled events. |
ONLINE.PRO | Per-node status. |
BINLOG.PB | The call log. |
PBConfig also checks NODE_IDX.PRO, the nodelist index. It has the same layout in both versions, so it never needs converting.
A converted file is written beside the original and swapped into place only after it is complete, so a crash never leaves a half-converted file. A file whose size does not fit either layout is reported and left alone.
.P3X files built for v4. The ones that shipped with ProBoard are installed for you.DOORS.PRO and several files in Configs that 16-bit ProBoard never had. When PBConfig offers to create them, answer Yes.This is the simplest way.
PBInstall.exe (see Installing ProBoard v4).If PBInstall also finds FastEcho or Internet Rex, it offers to import their settings. See Importing FastEcho and Internet Rex settings; you can skip it and do it later.
Use this when you only want to convert data files, for example in a copy of your board, or when PBInstall has already run and you want to check the result.
PBUpgrade_Backups (with a list of each file's size and checksum). Only if that backup succeeds does it convert the old files.
Figure 1. The Upgrade Data page after a scan of a 16-bit system.
When PBConfig starts and finds that required data files are missing, it offers to create them and then opens on this page, because a missing set of files is the usual sign of a system that has just been moved to v4.
Some boards that ran an early v4 test build before October 2026 have damaged dates in USERS.BBS. A fault in that build wrote four-digit years where two-digit years belonged and spilled into the neighbouring fields. If your users show impossible birth, first-call or last-call dates, use the repair:
The repair keeps any date that is still readable. A date whose text has been overwritten cannot be recovered; it is set to 00-00-00, which ProBoard treats as “no date”.
Boards that only ever ran 16-bit ProBoard do not need this.
Older layouts keep CONFIG.PRO, MESSAGES.PB, AKA.PRO and the other data files in the main folder. Move Config Files…, also on the Upgrade Data page, moves them into Configs and the language files (.PBL) into LANG, and then restarts PBConfig so every screen reloads from the new places. It is optional.
Nothing is deleted. PBInstall keeps its backup in PBInstall_Backups and the PBConfig tools use PBUpgrade_Backups, each in a folder named with the date and time. To go back, stop everything and copy the files from the backup folder over the converted ones. Use the copy of your whole folder if you also want the old programs.