Returning to CID, where's my configuration?

I used to make some use of Comodo Ice Dragon before a hard drive crash in 2014. I had my data professionally recovered. Recently Firefox has become so awful that I felt the need for another Gecko browser.

I copied the Program Files folder from the recovered data to a secondary hard drive, and I copied the Application Data folders to my C drive. I was very disappointed to find that when I opened the GUI there were no bookmarks, no Session Manager or other extensions, and no browser history. The same thing obtained when I opened the GUI directly from the recovered data folder. I found through careful checking that the folders do indeed contain the files they need to produce these things in the GUI.

Suggestions?

Computer: DELL Dimension 2400
CPU: Intel Pentium 4-2667 (Northwood, D1)
2666 MHz (20.00x133.3) [at] 2658 MHz (20.00x132.9)
Motherboard: DELL 0G1548
Chipset: Intel 845GEV (Brookdale-GEV) + ICH4
Memory: 2048 MBytes [at] 166 MHz, 2.5-3-3-7
- 1024 MB PC3200 DDR-SDRAM - Kingston K
- 1024 MB PC3200 DDR-SDRAM - Kingston K
Graphics: Intel 82845G/GL/GV Graphics Controller [DELL]
Intel i845G(L) Integrated, 64 MB
Drive: WL120GPA872, 117.2 GB, E-IDE (ATA-7)
Drive: WDC WD2500JB-57GVC0, 244.2 GB, E-IDE (ATA-6)
Drive: HGST HTS545050A7E380, 488.4 GB, Serial ATA 3Gb/s <-> USB
Drive: SAMSUNG CD-R/RW SW-252S, CD-R Writer
Sound: Intel 82801DB(M) ICH4(-M) - AC’97 Audio Controller [A-1]
Sound: Creative Technology SB Live! Series Audio Processor
Network: RealTek Semiconductor RTL8139 PCI Fast Ethernet NIC [A/B/C]
Network: Broadcom 4401 10/100 Integrated Controller
OS: Microsoft Windows XP Home Edition Build 2600
Antivirus: Panda Antivirus Pro 17.0.1
Firewall: Panda Antivirus Pro 17.0.1
Default Browser: Maxthon 4.4.8.1000

Re-installing didn’t help.

Worked on it some more and have been able to get my extensions and my search engines back into the GUI, but not yet my history, bookmarks, and old Session Manager sessions.

Turns out re-installing was necessary but not sufficient. After a lot of work reading up on Gecko browser application files and using Beyond Compare to compare the folders and files and copy from the recovered data folder, I was finally able to get all my data back in my present Comodo IceDragon GUI.

Now can I import profile data from Firefox that I’m abandoning to Comodo IceDragon?